The astronaut did many experiments in th

问题选择题

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

答案

答案：B

题目分析：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。