Californiasealionsarethefastes-优题课

Can trees talk? Yes, but not in words. Scientists have reason to believe that trees do communicate (交际) with each other. Not long ago, researchers learned some surprising things. First a willow tree attacked in the woods by caterpillars (毛虫) changed the chemistry of its leaves and made them taste so terrible that they got tired of the leaves and stopped eating them. Then even more astonishing, the tree sent out a special smell---a signal (信号) causing its neighbors to change the chemistry of their own leaves and make them less tasty.
Communication, of course, doesn’t need to be in words. We can talk to each other by smiling, raising our shoulders and moving our hands. We know that birds and animals use a whole vocabulary of songs, sounds, and movements. Bees dance their signals, flying in certain patterns that tell other bees where to find nectar (花蜜) for honey. So why shouldn’t trees have ways of sending message?
55．It can be concluded from the passage that caterpillars do not feed on leaves that ______.
A．are lying on the ground B have an unpleasant taste
C．bees don’t like D have an unfamiliar shape
56．The willow tree described in the passage protected itself by ______.
A．changing its leaf chemistry
B．communicating with birds and bees
C．growing more branches
D．shaking caterpillars off
57．According to this passage, bees communicate by ______.
A．touching one anotherB．making special movement
C．smelling one another D．making unusual sound
58．The author believes that the incident described in the passage ______.
A．cannot be taken seriously B．should no longer be permitted
C．seems completely reasonableD．must be checked more thoroughly

One day, four lawyers were riding their horses along a country road. There had been a rain. Water was dripping(滴) from the trees, and the grass was wet. They rode slowly, talking and laughing. Suddenly they heard some noises from the tree above them. “What is the matter?” asked the first lawyer. “Oh, it’s only some old birds!” said the second lawyer， “The storm made one of the babies fall out of the nest. It is too young to fly, and the mother bird is very worried.” “What a pity! It’ll die down there in the grass,” said the third lawyer. “It doesn’t matter. It’s only a bird,” said the second lawyer. Then they rode on, talking and laughing as before. But the fourth lawyer, whose name was Abraham Lincoln, stopped. He got down from his horse and took the little one in his big warm hands.
“Never mind, my little fellow,” said Mr. Lincoln， “I will put you back in your little nest.” He climbed up the tree and put the bird softly into their warm little home. A few minutes later, Mr. Lincoln joined them again. His shoes were covered with mud and he was wet. Then the other three laughed at him. They thought it was foolish for a strong man to do so much just for a young bird. “Gentlemen,” said Mr. Lincoln, “I could not sleep tonight if I had left the helpless bird in the grass.” Later Abraham Lincoln became very famous as a lawyer. He also became the president of America. He was one of the greatest American presidents.
51. The reason why the mother bird was worried was that ______.
A. there was a rain B. the lawyers were under its tree
C. one of its babies fell out of the nest D. it could not fly
52. We can learn about the other three lawyers from the passage that ______.
A. the second lawyer was kind
B. they were all cold-hearted
C. they did something to save the baby bird
D. the third lawyer put the bird into its nest
53. The underlined phrase “little fellow” in paragraph 2 means ______.
A. the mother bird B. Lincoln’s little friends
C. the other three lawyers D. the baby bird
54. From the passage we know Lincoln ______.
A. liked riding horses
B. was very kind and loved birds and animals
C. liked being laughed at
D. wanted to be the president of America then

People are being invited to sit down to eat with their neighbors in a nationwide lunch party designed to promote community spirit. The Big Lunch is the idea of the Eden Project in Cornwall. It aims to persuade people up and down the country to hold street lunch parties.
Tens of thousands of vegetables, fruits and flowers were used to construct a giant 2,000-square-foot lunch invitation in London’s Convent Garden. More than 9,000 cauliflowers and 800 bananas were used.
According to the organizers, people who decide to take part in the activity will get support from large companies which will supply many of the necessities, including plants to be given out to people to grow. The organizers think that the Big Lunch is a great opportunity for people to get together and spend time with their neighbors, friends and families. Events like this also help build strong communities. People can show their talents, get over their embarrassment, shake hands and get to know their neighbors, and realize that the neighborhood where they live can be a great source of happiness and enjoyment.
The Eden Project’s leader, Tim Smith, says, “It’s a good way to face this recession. Imagine a day on which millions of us, throughout the UK, sit down to have lunch together with our neighbors in the middle of our streets, around our tower blocks, and on every patch of common ground. We’ll have cooked our own food, made our own entertainment, and created our own decorations. It will be a day to share bread with our neighbors, and put a smile on Britain’s face.”
62. The Big Lunch aims to _____.
A. persuade people to eat healthy food B. encourage people to cook at home
C. help poor people in the community D. develop community spirit
63. Which of the following is false?
A. Large companies will give participants enough money to hold the lunch parties.
B. The Big Lunch may be a good opportunity to show talents and make friends.
C. The Big Lunch is a nationwide activity designed by The Eden Project.
D. The giant lunch invitation in London used a lot of vegetables, fruits and flowers.
64. Big Lunch is a good opportunity for people to _____.
A. enjoy free food B. have fun with neighbors and families
C. shop on the street D. eat without cooking
65. The underlined word “recession” in the last paragraph probably means_____.
A. nice environment B. grand ceremony
C. rapid progress D. economic decline

59. For admission to the Detective House, a shopper needs to _____.

A. be a DBS card owner B. spend a total of $150
C. answer 3 simple questions D. have experience in solving cases
60. Mrs. Rosland, a DBS card holder, spent $200 in the mall, and she would be entitled to _____.
A. a free air ticket and a mother-of-pearl necklace
B. a white gold diamond and a limited edition key chain
C. a sure win gift of limited edition car key chain
D. a Peugeot P200 and a set of white gold diamond
61. Which of the following statements is true?
A. DBS Bank and Fraser Mall are the official sponsors.
B. All shoppers are entitled to a draw for free air ticket.
C. The rewards are open to all shoppers for the entire month of April.
D. DBS Card owners enjoy double chances in the "Win a car" lucky draw.

Babies born in summer are more likely to become short-sighted in late life, a study has shown.

As many as a quarter of all cases of short-sightedness are caused by too great an exposure to sunlight in the first weeks of life, say eye experts.
They are advising all parents to put sunglasses on their babies during the first weeks.
Scientists had already established that over-exposure to sunlight caused short-sightedness in animals.
Researchers who compared the months in which babies were born with whether they needed glasses later on say the principle also applies to humans.
A study of almost 300,000 young adults─the largest of its kind─showed that those born in June and July had a 25 per cent greater chance of becoming severely short-sighted than those born in December or January. Research leader Professor Michael Belkin, of Tel Aviv University, said it was because prolonged illumination(光照) causes the eyeball to lengthen, causing short-sightedness.
Hence the more light a newborn is exposed to, the more the eyeball lengthens and the worse the short-sightedness will be.
The mechanism which lengthens the eyeball is associated with levels of melatonin(褪黑激素), a pigment (色素) which protects the skin against harmful rays of the sun.
In young babies not enough melatonin is released as protection, meaning they are more vulnerable to sunburn and changes to eyeball shape.
Sight expert Professor Daniel O’Leary, of Anglia Ruskin University in Cambridge, said “At the moment we don’t know the precise cause of why light exposure affects sight, but the evidence seems to prove that it is one of the reasons for people becoming short-sighted.”
55. Babies born in summer are more likely to be short-sighted ____________.
A. because the summer sun is too strong for babies
B. because babies born in summer have lengthened eyeballs
C. if they are exposed to much sunlight in the first weeks after they are born
D. if parents don’t know a proper way to protect their babies’ eyes
56. Melatonin is a kind of material to ___________.
A. prevent the eyes from becoming near-sighted
B. protect the skin from harmful sun rays
C. make our body strong
D. protect babies’ eyes from summer sun
57. From what Professor Daniel O’Leary says we can conclude that ___________.
A. there is no evidence that short-sightedness is related to exposure to sunlight
B. whether light exposure affects sight still needs to be further proved
C. he believes that light exposure can cause short-sightedness
D. he tries to give the cause of why light exposure affects sight
58. The underlined word “vulnerable” in the passage probably means __________.
A. easy to be harmed B. resistant
C. protective D. changeable

A．That they are not worth much money.	B．That they have no natural enemies.
C．That they are protected well by laws.	D．That they are good at raising the young.