Question

The astronaut did many experiments in the spaceship,            great help for knowing more about space.

A．which we think it is	B．which we think is of
C．of which we think is	D．we think which is of

Answer 1

B

考查非限制性定語從句。句意“那位宇航員在太空船上做了許多實(shí)驗(yàn)，我們認(rèn)為這些實(shí)驗(yàn)對更多地了解太空很有幫助�！本渲杏卸禾枺�是非限制性定語從句，be of+抽象名詞，相當(dāng)于對應(yīng)的形容詞，例如：be of help=helpful；be of importance=important。故選B。