In the past few years, so many areas throughout the world have been hit by such

In the past few years, so manyareas 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

试题答案

【答案】

B

【解析】略