题目内容

语法填空(阅读下面短文,在空格处填入一个适当的词或用所给单词的正确形式填空。

Dear Lily,

Thank you for your letter. You wonder what my father is like. Now let me tell you.

My father is the person 1. I really admire in my life. He works 2. a teacher in a junior school. He is tall and wears a pair of glasses.

At school, he is a hard-working and humorous teacher so that all his students love him 3.(deep). He is quite patient to them and always tries his 4. to help them solve the problems. With his help, many students get good grades in the exams.

He is also a great father at home. He takes good care 5. us and is never angry with us even when we cause some 6. (trouble). Last Sunday, I 7. (break) the neighbor’s window when playing soccer. I was so scared 8. I didn’t know what to do. He encouraged 9. (I) to face my problem bravely. What’s more, he keeps on eating healthy food and 10. (exercise) every day. In his opinion, he should set a good example to us.

I love my father. He is my idol forever. Can you write and tell about your father? Best wishes!

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You are probably familiar with the saying:An apple a day keeps the doctor away. A recent research carried out by the Chinese University of Hong Kong may change the saying:An apple a day may keep aging away.

The research chose fruit flies(果蝇), as they share many genes(基因)with humans. The fruit flies were either fed normally or had an apple extract(浓缩物) added to their diet.

It turned out that those fruit flies that were given apple extract lived about 55 days—five days longer than the flies that were normally fed. The research group also found it easier for the flies to walk,climb and move about as they aged.

According to the result, the researchers believed that the antioxidants(抗氧化剂) in the apple extract helped clean up dangerous chemicals(化学物质) that cause illnesses,as well as aging.

In another study,researchers examined diets of thousands of women. They discovered that those who regularly ate apples were 20 percent less likely to suffer heart illnesses and stroke.

The apples’ genetic code(遗传密码) was discovered recently. It allows scientists to develop nicer and healthier fruits. Researchers are already using the information to grow a kind of apples full of antioxidants that can keep eyes and joints healthy and protect humans against heart illnesses and cancer.

Apples that kill the desire(欲望) to eat could also be produced, with the first“extra-healthy’’apples on supermarket shelves within just four or five years.

The team that keeps studying apple DNA includes 100 scientists from five countries. Their research also suggests that around 65 million years ago, when dinosaurs began to die off the plant,which would finally become today’s apple tree, experienced a great genetic change. The number of many of its genes doubled. The extra genes allowed the apple to get used to worse conditions and go through a different development from peaches,strawberries and other related fruits.

1.Why were fruit flies used for the research?

A. Because they have a similar diet to humans.

B. Because they have a history as long as apples.

C. Because they share a lot of genes with humans.

D. Because they feed on nothing but apple extract.

2.What result did the researchers find out?

A. Apples produce chemicals that can change human genes.

B. Apples have antioxidants that kill chemicals that cause aging.

C. Apples are rich in vitamins that are needed in humans’ bodies.

D. Apples produce chemicals that make apples taste more delicious.

3.What happened to apples around 65 million years ago according to the research?

A. Their genes stopped their development as the environment got worse.

B. Their genes became twice in number but they finally died off like dinosaurs.

C. They experienced a great genetic change making them used to worse conditions.

D. They went through a similar development to peaches, strawberries and other related fruits.

4.What can we infer(推断)from the passage?

A. Eating apples may bring us more advantages than we might believe before.

B. People who have the habit of eating apples don’t need to see a doctor.

C. Apples that kill the desire to eat are already available in supermarkets now.

D. People will eat apples instead of peaches and strawberries from now on.

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