下面短文中有10处语言错误。请在有错误的地方增加、删除或修改-优题课

More and more scientific experiments prove that physical exercise can reduce the dangers of some illnesses in middle-aged persons．Exercise strengthens the heart muscle，reduces blood pressure and help to prevent muscles from changing into fat．Physical exercise is just as important for children．
Exercise and food affect growing speed in young lab animals．Baby mice start running as soon as they are big enough to use an exercise wheel in their cage．If they get extra food and run a lot，they will grow as much as 1.5 times bigger than normal．
The same differences in growing speed might be found between active and inactive children．Physical exercise helps active children grow faster than inactive children．One experiment shows that the brains of the mice that had enough exercise weighed about 3％more than those of the mice that did not exercise The mice that exercised are much quicker to learn doing new exercise than the mice that did not exercise．
The results of the experiments suppose the theory that exercise can help babies learn to talk and walk sooner than expected．
The good effects of physical exercise are not limited to children and middle-aged people．Exercise continues to be an important part of our lives after we grow old．For example，people over 50 years old begin to lose calcium(钙) from their bones，which get weaker and can break easily．Physical exercise，however，helps to strengthen the bones and to prevent them from losing calcium．Of course，old people can take medicines to prevent themselves from suffering from losing calcium．But the medicines they take increase the chance of developing some kind of cancer(癌)．So physical exercise is a much safer treatment(治疗)．
根据短文内容完成下列表格，一空一词。

Title	Physical exercise
Theme	Physical exercise does to people’s health ,both young and old.
of experiments	·Baby mice will be as much as 1.5 times bigger than normal on that they eat extra food and run a lot. ·The brains of the mice that had enough exercise were than those of the mice that didn’t exercise.
	Children	·Helping active children grow faster than inactive children. ·BeingFor babies to learn to talk and walk sooner.
The middle-aged	·the heart muscle. ·Reducing blood pressure . ·Preventing muscles from changing into fat.
Old people	·Helping the old people’s bones get by preventing them from losing calcium. ·the chance of developing some kind of cancer by medicine.

Dear Liz,
My stay in Thailand has certainly been the experience of my life.
Life is busy and exciting. Bangkok is just like any other big city with a population of 10 million and heavy traffic. I’m very lucky because my host family is in a nice quiet area outside the city. There are Mr. and Mrs. Phairat, their son Sanan, who is 18, the daughter Chinda, who is 16, and Grandpa and Grandma.
I go to an international school with Sanan and Chinda. The school teaches about 70 percent in English, and 30 percent in Thai. I've learned some spoken language, but Thai writing is very difficult, The cooking lesson is my favourite. I'm learning all about Thai food and culture People don’t use chopsticks here, but spoons and forks. When I come back, I'm going to cook you a real Thai meal.
Last weekend we visited some temples. We also drove to Pattaya beach near Bangkok. I thought it was great, but Sanan and Chinda say that next month they’re taking me to Phuket Island, where the beaches are even more beautiful. The month after next, we’re going to travel to Mr. Phairat’s hometown in the north of Thailand. The Phairat’s own land there, and they have two elephants. I’m going to ride those elephants — and even wash them. Sanan and Chinda say it’s really fun.
I'm amazed by everything in this country, especially by the elephants. Elephants are an important part of Thai culture and way of life. They have been a traditional symbol of Thailand for many years in times of war and peace. In the seventh century, a Thai king trained 20, 000 elephants for battle.
I’ll tell you all about my Thai boxing lessons next time I write.
Love,
Mandy
How many family members are there in Mandy’s host family?

A．4

B．5

C．6

D．7

Next month, Mandy is going to visit__________.

A．Pattaya beach

B．Phuket Island

C．Phairat’s hometown

D．Bangkok

From the letter we know that Mandy is__________ when she stays in Thailand.

A．bored

B．quiet

C．excited

D．proud

What is the letter mainly about?

A．Study trip in Thailand

B．Food culture in Thailand

C．Elephant riding in Thailand

D．International schools in Thailand

请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入最恰当的单词。
Culture shock isn’t a clinical term or medical condition.It’s simply a common way to describe the confusing and nervous feelings a person have after leaving a familiar culture to live in a new and different culture.
It’s natural to have difficulty adjusting to a new culture.People from other cultures may have grown up with values and beliefs that differ from yours.Because of these differences，the things they talk about，the ways they express themselves and the importance of various ideas may be very different from what you are used to.But the good news is that culture shock is temporary.
What causes culture shock?
To understand culture shock，it helps to understand what culture is.You may know that genes determine a big part of how you look and act.What you might not know is that your environment has a big effect on your appearance and behavior as well.
Your environment isn’t just the air you breathe and the food you eat，though；a big part of your environment is culture.Culture is made up of the common things that members of a community learn from family，friends，media，literature，and even strangers.These are the things that influence how you look，act，and communicate.Often，you don’t even know you are learning these things because they become second-nature to you－for instance，the way you shake hands with someone，the kind of things you find funny，or how you view religions.
The differences between cultures can make it very difficult to adjust to the new surroundings.When you go to a new place，such as a new country or even a new city，you often enter a culture that is different from the one you left.Sometimes your culture and the new culture are similar.Sometimes，they can be very different.What might be perfectly normal in one culture－for example，spending hours eating a meal with your family－might be unusual in a culture that values a more fast-paced lifestyle.
根据短文完成下列表格，一空一词。

Culture ____________
Definition	·Culture shock is a kind of ______ people have when living in a new and different culture. ·Culture shock results from the difficulty people have in __________themselves to new surroundings. ·Culture shock is ____________.
__________	·____________largely determine your appearance and behavior. ·Culture，an important part of __________，has an influence on the __________people look，act and communicate. ·The between cultures contribute to the difficulty in getting used to new surroundings, as something in one culture seems unusual in another.

People often don’ t do what they really want to for fear
of failure. You don't apply for a job case you don't_____
get it. You don't perform at the school concert b others_____
might laugh at you. A lack of confidence can lto a lot_____
of suffering. The key to o this problem is to believe in _____
yourself. This might be(容易)said than done, but there_____
are many w___ to help you do this. Talk about your problem____
with a friend or lookadvice on the Internet. Imagine_____
yourself being (成功）and practice breathing techniques_____
to keep you calm when you get nervous. And theimportant_____
thing is:believe you can do it. When you’ve____ (学会）to do_____
that, you are well on your way.

请认真阅读下面短文，在表格中的空格里填上最恰当的单词(每空1个单词)
Since the beginning of human evolution, men have migrated（迁移）across continents in search of food, shelter, safety, and comfortable weather. People still move for these reasons, but new reasons for human migration are arising, such as job relocation(重新安置) and overpopulation.
Three million migrants are moving from poor countries to wealthier ones each year, and increasingly, their destination is a neighboring country in developing parts of the world. People are moving within the developing world for the same reasons as they migrate to wealthier nations. People from poor countries are going to less poor countries, fleeing wars and conflicts. They are also responding to population pressures because some countries are densely populated, and they often have high population growth. Those people need to go somewhere else.
There are three main reasons why people move. The basic categories and percentages are as follows, according to the Current Population Surveys (CPS):
Family-related reasons account for 26.3%, including changes in marital（婚姻的） status, establishing a household and other family reasons; work-related reasons 16.2%, including job transfer, retirement, and other job-related reasons; housing-related reasons 51.6%, including new and better houses, better neighborhood, cheaper housing and other housing reasons; the remaining 5.9% of other reasons are attending college, the change of climate and health reasons.
Americans have been migrating south and west for decades in search of better job opportunities and warmer climates. They have also been moving to places a little far from cities, in search of bigger yards and houses, lower crime rates and better schools. In 1950, nearly a fifth of the population lived in the nation's 20 largest cities. In 2006, it was about one in ten. That's why many American people say, “Big Cities Shrink as People Move South, West.”
Between March 2005 and March 2007, 73.4 million Americans moved. Fifty-six percent of these moves were within the same country. Twenty percent were between counties but in the same state. Nineteen percent were moves to a different state. Some families even went abroad.
Title: People on the

Lead-in	Throughout human, people have migrated across continents.
An number of people from poor countries are moving tocountries, especially neighboring ones.
for people's migration	According to the CPS, the of people move to other places for reasons to housing.
Tofor a better job chance, a warmer and a bigger yard,Americans have long been moving south and west.
Conclusion	Now every year more and more people move to other places, which seems to have become a global.