1. Not only the student disturb the authority of the older generation he can threaten the social system as a whole.
2. We had hardly arrived when does she started crying to go home.
3. Scarcely they had settled themselves in their seats in the theatre when the curtain went up.
4. Under no circumstances we should do anything that will benefit ourselves but harm the interests of the state.
5. Not until an infant hedgehog(刺猬)opens its eyes it leaves its nest to follow its mother about.
6. Down jumped was the burglar from the tenth floor when the policeman pointed his pistol at him.
7. Most of his classmates agree with the opinion that bad as he is, but he has his good points.
8. Not until have I passed the examination will I be able to go out to parties.
9. No fewer than one thousand people did come here to attend the competition.
10. No sooner had he drunk the coffee when he began to feel drowsy.

【参考答案】
1. only后加does
2. 去掉does
3. they had—had they
4. we should—should we
5. it leaves—does it leave
6. 去掉was
7. 去掉but
8. have I—I have
9. did come—came
10. when—than