Question

Stephen Hawking believes that the earth is unlikely to be the only planet _______ life has developed gradually.

A．that

B．where

C．which

D．whose

Answer 1

B

試題分析：考查定語從句：先行詞是the only planet，定語從句缺少地點(diǎn)狀語，用where引導(dǎo)定語從句，句意：Stephen Hawking認(rèn)為地球不可能是生命逐漸發(fā)展的唯一星球。選B.
點(diǎn)評：定語從句的考查主要就是考查關(guān)系詞的辨析，關(guān)系代詞that, which, whose, whom, as， who在句中做主語，賓語，表語或者定語；where, why, when在句中做狀語。要分析句子成分，看缺少什么成分，就選用相應(yīng)的關(guān)系詞。