In the past few years, so many areas thr

问题选择题

In the past few years, so many areas throughout the world have been hit by such destructive earthquakes, snowstorms and tsunamis ________ we have never experienced before, ________ makes us worried a lot about nature disasters.

A．that; that

B．as; which

C．which; it

D．when; as

答案

答案：B

考查定语从句。定从________ we have never experienced before的先行词是such destructive earthquakes, snowstorms and tsunamis，和such连用，要用关系代词as; 定从________ makes us worried a lot about nature disasters.的先行词是前面整个句子，用which引导。所以选B。