1 . The plan will extend protection to a significant number of areas that ________ previously unprotected.

A．had been

B．have been

C．were

D．will be

2 . His publishers made him __________ (修订) his manuscript three times. (根据汉语提示单词拼写)

3 . Nerve cells have limited ability to regenerate if d______ (破坏，毁灭). (根据中英文提示填空)

4 . The words could be interpreted as a welcoming greeting from a close friend, especially if ________ (accompany) by a gentle smile. (所给词的适当形式填空)

5 . “The restaurant was here until five years ago,” said the policeman. “It ________ (tear) down then.” (所给词的适当形式填空)

6 . Mr. Green’s hometown _________(destroy) by the earthquake last year. （所给词的适当形式填空）

7 . Captions usually _________(summary) the author’s main point as well. （所给词的适当形式填空）