1 . ________twice, the postman refused to deliver our letters unless we chained our dog. (根据句意单词拼写)

2 . The computer p________ (购买) last week went wrong again. (根据中英文提示填空)

3 . The research,         by Tsinghua University, shows that different parents have different approaches to these problems.

A．conducted

B．to conduct

C．conducting

D．to be conducted

4 . The Internet keeps us ________(inform) of the latest news and also provides entertainment for us at home. (所给词的适当形式填空)

5 . The girl answered the question in such a low voice that she couldn’t make herself________(hear) by others. (所给词的适当形式填空)

6 . The father wants his daughter ____________ (teach) the piano. (所给词的适当形式填空)

7 . _____(found) in the early 20th century, the school keeps on inspiring children’s love of art. (所给词的适当形式填空)

8 . A rescue worker risked his life saving two tourists _________(trap) in the mountains for two days. (所给词的适当形式填空)

9 . With the government’s aid, those___________（affect）by the earthquake have moved to the new settlements. （所给词的适当形式填空）

10 . Lightening is usually ________(伴随) by thunder.