题目

题型：不详难度：来源：

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

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。