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

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

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