Thinkingissomethingyouchooseto-优题课

The sandstorm has a bad effect on human beings, but it also brings some good results. There wouldn’t have been our Chinese nation if there had been no sandstorms. Sandstorms have existed for millions of years, while the written history of human beings has lasted only 5,000 years. The Loess Plateau(黄土高原) was formed by sandstorms over millions of years. The Yellow River, while moving through the Loess Plateau, carries a great deal of sand and has formed the North China Plain. The Loess Plateau is regarded as the place where Chinese civilization(文明) began. If there had been no Loess Plateau, the North China Plain wouldn’t have existed, nor would have the Chinese civilization.
Sandstorms don’t bring only loess to human beings. When sandstorms move from central Asia to the Pacific regions, they carry some minerals into the air, which will later fall into the ocean in the form of rain. The minerals will help some planktons(浮游生物) to survive. The planktons are eaten by small shellfish, and fish live on these small shellfish, and fish are eaten by humans. This forms a biological chain which shows a relation between humans and nature.
So it is unrealistic to say we should stop sandstorms. What we can possibly do is to reduce their bad influence as much as we can.
59. The underlined sentence in the first paragraph probably means _________.
A. there are many sandstorms in China
B. the land of China was made by sandstorms
C. sandstorms helped to form Chinese civilization
D. the history of sandstorms was longer than that of Chinese nation
60. How does the sandstorm help to form the biological chain?
A. The sandstorm carries lots of rain into the ocean.
B. The sandstorm helps some minerals fall into the ocean.
C. Some minerals directly fall into the ocean in the form of rain.
D. The sandstorm moves from central Asia to the Pacific regions.
61. The writer thinks that _______.
A. the sandstorm only has a bad effect on human beings
B. sandstorms bring about lots of trouble, but we can still make use of them
C. without sandstorms, there would be no Chinese civilization and human beings
D. sandstorms play an active role in the Chinese civilization, so we should protect them
62. The text mainly talks about _______.
A. the history of sandstorms B. what the biological chain is
C. how the Loess Plateau formed D. the good effects of sandstorms

The Florida Sea Base Programs
Diving Adventure
If you are a diver, this is your program. During the program you will be making as many as nine dives (weather permitting), including a night dive. We have open dates in June, July and August for the summer months and for fall we have opening in September, October, November and December. Check out the dates today. Click here!
Sea Exploring!
The name brings back the memory of pirates(海盗) sailing the high seas of the past. This adventure is for larger teams of 18 to 20 teammates. Sailing on a tall ship with your team, you will be making memories that you will share for the rest of your life with anyone who will listen. Be sure and check out the dates we have open. Click here! We can fit your timetable to meet your needs with these great dates.
Live Aboard Diving
The Florida Sea Base has the sailing and diving programs joined for one wonderful adventure! On this adventure, you will spend your days not only in diving, but also in sailing around the Florida Keys. There are openings this fall and winter. Check now for open dates to spend your winter holidays in the keys. Click here! Fall dates are open now. Check them out today!
Just around the corner: the Christmas season in the keys! We have an opening for the Live Aboard program on December 26. Book today---it won’t last long!
Diving Certification(证书)
The Diving Certification program is designed for teammates who want to get a certification--- all who complete the week successfully will be offered PADI certification! Come and learn how to dive in the beautiful waters of the Florida Keys.
We have the following dates open: August 5, August 12, August 19, August 22 and August 26. We also have programs we offer in the fall: September 30, October 7, October 14, October 21, and many more dates. Check out the rest of the dates. Click here!
55. The text is most probably found _________.
A. in a newspaper B. on the Internet
C. in a science magazine D. in a book about Florida Sea
56. Colin wants to join in the Diving Adventure. He is supposed to have ______.
A. 9 dives B. 10 dives
C. 19 dives D. as many dives as he likes
57. According to this text, Live-Aboard Diving is special in that ____.
A. diving goes on during the sailing
B. it is an adventure at sea
C. there are diving programs in it
D. it is held in the Christmas season
58. The purpose of the text is mainly to ________.
A. teach B. introduce C. report D. advertise

Online shopping started not so long ago. Tim Berners-Lee invented the World Wide Web in 1990. The first online bank opened in 1994. In 1995, Amazon started operating and is now one of the largest online shopping malls. Then in 1996, eBay started its online shopping site.
By sitting at home you can now buy anything from knives to cars. The worry you may have about traveling and parking can be avoided while you shop online. With online shopping, you need not worry about the weather. Online shops have no holidays, closing times or any other problems. You can shop 24 hours a day, 7 days a week and 365 days a year. Some online shops also keep customers’ opinions about each product, so you can easily find out what other customers think about the product before buying it.
When you go for real-world shopping, you can actually touch and feel it, but in online shopping you can only see the pictures. Also if you are shopping online, you have to be careful with your credit cards.
The first step in online shopping is to search for what you want to buy. Once you find the required product, put it in a “shopping cart” and continue shopping. After you have got enough in your “shopping cart”, check out the product. You can add or take out the products in your shopping cart. The next step is to login(登录) using a username and a password. Enter the address where you want the product to be sent. Some sites even ask for your email, phone numbers, etc. Then wait for the confirmation(确认)of your order. You can also cancel the order if needed. Online shopping is a different experience and you can make shopping online easy when you get used to it.
51. When shopping online, you can _______.
A. buy anything wherever you go B. park your cars where you want to
C. touch anything you want to buy D. know what others think of the product
52. The second paragraph mainly tells us ______.
A. the things people can buy in online shops
B. people can know different opinions of customers
C. people can do online shopping at their own homes
D. the advantages people can have through online shopping
53. From the text we can know that ______.
A. customers needn’t have a username to buy something online
B. customers must give their emails as well as their phone numbers
C. customers should be careful with their credit cards when shopping online
D. once customers put the products in their “shopping carts”, they can’t change them
54. If you want to buy a cup online, what is the right order of the following things you can do?
a. Enter the address
b. Search for a right cup
c. Wait for the confirmation of the order
d. Put the cup into your “shopping cart”
A. b-c-d-a B. b-d-a-c C. a-b-c-d D. c-d-a-b

.Can you imagine your doctor warning that taking a bath could be unhealthy? In the early 1800s, many doctors thought that bathtubs(浴缸) could carry diseases, so they advised against their use. The advice wasn’t based on personal experience, because few of the doctors owned bathtubs. The White House did not even have a bathtub until 1851.
In the 19th century, only one home out of six had a bathroom. A child took only one bath a week. On Saturday nights, children all lined up for their turns to wash in a wooden bathtub in the kitchen. Mothers had to boil the water on the stove and carry it over to fill the bathtub. It’s no wonder that children could not jump into a bathtub as they do today.
When the first bathtubs were introduced, even their makers weren’t sure whether the new fashion would last. They advertised their products as water containers that “could be used as bathing tubs”.
The bathtub became popular in America shortly after World War I. By then most middle-class families had indoor taps. At first most bathtubs were made of wood, but as the popularity of the product increased, so did the creativity of bathtub makers. Before porcelain(瓷) bathtubs there were rubber ones like the plastic swimming pools kids use today. In the past few years owners often invited guests to see them. They told their friends how wonderful baths in these bathtubs could be.
Now doctors no longer warn that bathtubs carry diseases. Instead, they tell their patients about the benefits of frequent bathing in the bathtubs. Maybe one of the best reasons why doctors encourage frequent trips to the bathtub is that bathed patients smell better!
47. Many doctors in the past were against using bathtubs because ______.
A. they didn’t have their own bathtubs
B. they thought bathtubs could carry diseases.
C. the children might hurt themselves in the bathtubs
D. bathtubs were too expensive for the common families
48. Why couldn’t children jump into a tub in the 19th century as they do today?
A. It was unhealthy to do so. B. The bathtubs were not enough.
C. Mothers were always busy. D. The bathtubs were made of wood.
49. Which of the following is true according to the text?
A. Some different materials can be used to make bathtubs.
B. In the 19th century only one home out of seven had a bathroom.
C. The bathtub became popular when they were introduced to the market.
D. Children prefer the bathtubs made of plastic to those made of porcelain.
50. It can be inferred from the last paragraph that ______.
A. all the doctors have bathtubs in their homes
B. the doctors have realized the advantages of bathtubs
C. the doctors will make lots of money by advertising bathtubs
D. the patients should take a bath before going to see a doctor

If your mother wants to tell you something, she uses words. Birds cannot talk as we do. But some birds can make sounds to warn their young of danger. They have their own way to make the young birds do certain things.
The jackdaw is a kind of blackbirds that lives in Europe. Jackdaws live together in flocks（群）.Young jackdaws do not know their enemies. When an older jackdaw sees a dog, it makes a loud rattling（格格响的）sound. The younger birds know this sound means an enemy is nearby. The sound warns them to know their enemies.
If a young jackdaw is in a dangerous place, a jackdaw parent flies over him from behind. The parent bird flies low over the young bird’s back. The parent’s tail feathers（羽毛） move quickly from side to side. It is trying to say,“Follow me.”At the same time, the parent calls out,“Ｋey-aw,”key-aw.”The parent means,“Ｆly home with me.”The young bird then follows the older one home. Young jackdaws do not have to learn what certain sounds mean. They know the meaning of these sounds form the time they hatch（孵出）.
72．The jackdaw lives in .
A．Europe B．Australia C．America D．Africa
73．Which of the following does this story lead you to believe?
A．All animal parents can talk to their young.
B．Dogs are the most dangerous enemies for jackdaws.
C．Young jackdaws know the meaning of their parents’ sound when they grow older.
D．Some birds can give certain information to one another.
74．Parent jackdaw can use their tail feathers to .
A．ask their young to follow them B．play a game with the young
C．tell the meal time D．give a warning of a fire
75．This story tells much about .
A．the danger of jackdaws
B．ways in which mother can talk to their children
C．the way jackdaws warn their young of danger
D．how the jackdaw are living
76．When an old jackdaw sees a dog, it .
A．calls out,“Follow me.” B．makes a loud sound
C．flies away D．fights the dog