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

B

試題分析：句意：宇航員在宇宙飛船里做了許多實(shí)驗(yàn)，我們認(rèn)為這些實(shí)驗(yàn)對(duì)理解太空知識(shí)很有幫助。轉(zhuǎn)換句子結(jié)構(gòu)，答案就會(huì)顯露出來：…and we think they(the experiments) are of much help for knowing space.
be of much help="be" very helpful。which的先行詞為“the experiments”；we think變成了插入語。去掉這個(gè)插入語，答案更加明了。