Question

【题目】Old－fashioned phones matter when wireless networks in disasters.

A. turn down B. turn out

C. break down D. break out

Answer 1

【答案】C

【解析】

C

解析　句意为：当无线网络在灾难中出故障时，老式电话起很大作用。turn down关小，拒绝；turn out结果是；break down崩溃，损坏；break out(战争、火灾等)爆发。由句意知选项C正确。