【題目】Old-fashioned phones matter when wireless networks _____in disasters.
A.turn down
B.turn out
C.break down
D.break out

【答案】C
【解析】句意:在災(zāi)難中無線網(wǎng)絡(luò)出故障的時候舊式的手機就起作用了。 A.turn down“拒絕,降低聲音”;B.turn out“結(jié)果是”;C.break down“出故障”; Dbreak out.“爆發(fā)”。根據(jù)句意,選C。

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