【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】

C

解析　句意為：當(dāng)無線網(wǎng)絡(luò)在災(zāi)難中出故障時，老式電話起很大作用。turn down關(guān)小，拒絕；turn out結(jié)果是；break down崩潰，損壞；break out(戰(zhàn)爭、火災(zāi)等)爆發(fā)。由句意知選項(xiàng)C正確。

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