Question

The astronaut did many experiments in the spaceship, ______ much help for knowing space.

A. which we think it is                                             B. which we think are of

C. of which we think are                                         D. I think which is of

 

Answer 1

【答案】

B

【解析】

试题分析：句意：宇航员在宇宙飞船里做了许多实验，我们认为这些实验对理解太空知识很有帮助。转换句子结构，答案就会显露出来：…and we think they(the experiments) are of much help for knowing space.

be of much help=be very helpful。which的先行词为“the experiments”；we think变成了插入语。去掉这个插入语，答案更加明了。

考点：考查非限制性定语从句和插入语的位置