4. When children watch TV， their parents had better sit by their sides to guide them.
5. It’s proved by evidence that violent TV programs have bad effects on children’s growth.
词汇练习
I. 用所给单词的正确形式填空， 注意词性：
1. a. violence b. violent c. violently 2. a. significance b. significantly c. significant 3. a. real b. really c. reality 4. a. imagine b. imaginative c. imagination 5. a. express b. expression c. expressive II. 用下列所给单词的正确形式填空：
1. imitate 2. interpret 3. motive 4. monitor 5. evidence 6. recovery 7. reality 8. undermined 9. alternative 10. violence III. 把下列句子译成英语：
1. Peaceful negotiation has a long-lasting effect on the relation between two countries.
2. Given good health， I hope to finish the work this year.
3. I must point out that it is unrealistic not to make mistakes.
4. Many young people are crazy about football.
5. I think your plan is very good. However， are there any alternatives replacing it？
6. We should learn to distinguish the false from the true.
7. You can interpret this term in many ways.
8. He adopted a firm attitude toward the matter.
9. What the mother said implied that children might watch TV twice a week.
10. His work is to monitor a certain foreign broadcast.
课文B 练习
I. 根据课文判断下列句子正确与否：
1. √ 2. √ 3.× 4.× 5. √ 6. √ 7. √ 8.× 9. √ 10.×
II. 根据课文填上所缺的内容：
1. Current Science
2. mathematical reasoning， mechanical ability， problem-solving skills
3. vocabulary， spelling， memory
4. excited， make noises that sound like language
5. left
6. courage， energy， strong， independent
7. male hormones
8. still， commands
9. other people’s solutions， for themselves
10. key
词汇练习
I. 从右边一栏中找出与左边一栏单词相应的定义：
1. b 2. d 3. a 4. c 5. e
II. 选择填空：
1. A 2. C 3. B 4. C 5. B
语法练习
I. 在下列每个名词性从句下画线， 并分析其在句子中的功能：
1. that bones， muscles， and nerves develop faster in baby girls 主语从句
2. Why a bird will fly in circles when blinded 宾语从句
3. What being polite means 宾语从句， 作介词of 的宾语
4. What a majority of people consider acceptable and what they consider unacceptable宾语从句
5. that a loan contract always involves a promise to pay back a sum of money in the future 同位语从句
6. what a person will sacrifice to obtain 宾语从句， 作介词of 的宾语
7. that we live in an unsafe world 宾语从句
8. that fast readers are the best readers 表语从句
9. what he thinks a given word ought to mean 宾语从句， 作介词of 的宾语
10. what follows 主语从句
11. that boys are better at building things but girls have better vocabularies 主语从句
12. what they say 宾语从句
13. what you are looking for 宾语从句
14. if anyone would come 宾语从句
15. What is accepted as true 主语从句
16. what is known at a particular time 宾语从句， 作介词of 的宾语
17. why the wind blew and the leaves fell 宾语从句
18. what should be done when they came across an unknown word in their reading 宾语从句
19. that the great storms on the sun create large amounts of electric energy 同位语从句
20. that ginger root by some magical power could improve the memory 主语从句
II. 选择填空：
1. A 2. C 3. A 4. D 5. B 6. B 7. B 8. B 9. A 10. A
III. 把下列句子译成英语：
1. We should know that language learning is different from the study of other courses.
2. It’s well-known that the Atlantic Ocean is only half as big as the Pacific Ocean.
3. His conclusion is that meaningless information is hard to memorize.
4. Who will host tomorrow’s meeting has not been decided yet.
5. She explained to me why she wanted to send the child to the kindergarten.
6. He wanted to ask the manager whether a car would be bought.
7. More and more people have realized such a fact that heart attack is related to people’s life style.
8. It is said that the left side of the brain develops faster in girls than in boys.
9. The picture shows how the root of the plant deepens into the soil.
10. What they are not clear about is why each kind of bird has its own way of nesting.