1 . Complete the passage using noun clauses with words in brackets.

There are many mysteries about dinosaurs to which we long to find explanations. You may think that dinosaurs were big, green and scaly, right? In fact, it seems that they appeared very different from     1     (think).

In recent years, scientists have worked out     2     (look): many of them were small with feathers. However,     3     (have)feathers still isn’t clear-it might have been for communicating or for staying warm, but not just for flight.

Scientists also believe that many dinosaurs had bright colours. It seems     4     (depend on)their habitats. That is, dinosaurs which could fly would have had different colours to those living in the sea.

2 . 判断下列句子中as if引导的从句的类型
1. I remember the whole thing as if it happened yesterday.
2. “I was a black girl, from are refugee（难民）family”, Deka said. “It was as if I was only allowed to explore in this predetermined box.”

3 . 指出下列句子中从句的类型
1. It is uncertain what side effect the medicine will bring about, although about two thousand patients have taken it.
2. We should respect food and think about the people who don’t have what we have here and treat food nicely.
3. Why don’t you bring it to his attention that you’re too ill to work on?
4. When the news came that the war broke out, he decided to serve in the army.
5. Before a problem can be solved, it must be obvious what the problem itself is.
6. The message that you intend to convey through words may be the exact opposite of what others actually understand.
7. His writing is so confusing that it’s difficult to make out what it is he is trying to express.
8. The prize will go to the writer whose story shows the most imagination.
9. The days are gone when physical strength was all you needed to make a living.
10. I am afraid that he’s more of a talker than a doer, which is why he never finishes anything.

4 . 分析下列句子结构（A并列句；B简单句；C主从复合句；D并列主从复合句）
1. The workers were not better organized, otherwise they would have accomplished the task in half the time.(        )
2. The professor warned the students that on no account should they use mobile phones in his class.(        )
3. Most colleges now offer first-year students a course specially designed to help them succeed academically and personally.(        )
4. Kate heard a man's voice in the background, but she couldn't make out what he was saying. (        )
5. We can observe that artificial intelligence has already made an impact on our lives in many ways.(        )
6. I had hoped to send Peter a gift to congratulate him on his marriage, but I couldn't manage it. (        )
7. A city is the product of the human hand and mind, reflecting man's intelligence and creativity.(        )
8. Jack wasn't saying anything, but the teacher smiled at him as if he had done something very clever.(        )
9. To show our respect, we usually have to take our gloves off whoever we are to shake hands with.(        )
10. One reason for her preference for city life is that she can have easy access to places like shops and restaurants.(        )

5 . 判断下列句子含有哪类从句
1. When you see him,please say hello to him. ________
2. Is he the man who wants to see you? ________
3. I want to know what he has told us. ________
4. The fact is that we have lost the game. ________
5. What he wants to tell us is not clear. ________
6. While I agree with you,I can’t go with you. ________
7. He waited until I returned. ________
8. Where there is a will,there is a way. ________
9. I shall never forget the day when we moved into our new house. ________
10. He hid his storybook so that his teacher couldn’t find it. ________

6 . 判断下列句子中what引导的从句类型
1. This is what my father has taught me - to always face difficulties and hope for the best.
2. “My mom tells me that I can’t control what happens to me,” Natalie says, “but I can always choose how I deal with it.”
3. What is known to us is that tobacco contains nicotine (尼古丁) and other harmful products, so you should give up smoking.