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考查動詞的時態(tài)和語態(tài)。句意：山里的溫度在晚上會急劇下降，所以出去前穿上暖和的衣服。此處用一般現(xiàn)在時， drop是不及物動詞，沒有被動語態(tài)。

題目來源：2015全品語法快練高中英語新課標(biāo) > 訓(xùn)練15 動詞的時（語）態(tài)和主謂一致

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