[W48] Stephen Hawking believes that the earth is unlikely to be the only planet life has develop gr

题目

[W48] Stephen Hawking believes that the earth is unlikely to be the only planet life has develop gr
A.that B.where C.which D.whose
翻译,并分析.
Stephen Hawking believes that the earth is unlikely to be the only planet _______ life has develop gradually.

答案

翻译：史提芬·霍金认为地球不可能是唯一一个生命逐渐发展起来的星球.
此题同样考查定语从句的关系词的用法.
1.将先行词the planet代入定语从句中去,只能变成：
where life has developed gradually
= on which life has developed gradually
= life has developed gradually on which
= life has developed gradually on the planet
生命在这个星球上逐渐发展起来.
2.这就说明该定语从句缺少地点状语,所以用关系副词where充当.
其他ACD是关系代词,不能在句子充当状语,而只能充当主语/宾语/表语/定语.
3.还是老话,关系副词/关系代词的区别在于定语从句缺少的成分是什么.
如果缺状语,一定是关系副词.
且有如下变化公式：关系副词 = 介词 + 关系代词 = 介词 + 先行词.