【題目】 Temperatures________ quite dramatically at night in mountains, so put on some warm clothes before going out.

A. are dropped B. drop

C. are being dropped D. have dropped

【答案】B

【解析】

試題分析：句意：山里的氣溫晚上下降得厲害，所以出門前穿上一些暖和的衣服。山里的氣溫到晚上驟降是自然狀況，應(yīng)該用一般現(xiàn)在時(shí)的主動(dòng)語態(tài)。故選B。

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