题目内容
The workers risked their lives to restore communications in the disaster stricken areas, which were cut off ________ the powerful earthquake.( )
A. in case of B. in spite of
C. instead of D. because of
D
考查介词短语。根据题意可知通讯是因为地震而中断的,因此选择because of,表示原因。in case of 以防;in spite of尽管;instead of 代替,而不是。

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