10. 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

 

10.   B考查動(dòng)詞的時(shí)態(tài)和語(yǔ)態(tài)。句意：山里的溫度在晚上會(huì)急劇下降，所以出去前穿上暖和的衣服。此處用一般現(xiàn)在時(shí)， drop是不及物動(dòng)詞，沒(méi)有被動(dòng)語(yǔ)態(tài)。

題目來(lái)源：2015全品語(yǔ)法快練高中英語(yǔ)新課標(biāo) > 訓(xùn)練15 動(dòng)詞的時(shí)（語(yǔ)）態(tài)和主謂一致

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