—Whatareyoudoing,John?Whystop?—Tobeonthesafeside,we'dfi...
問題詳情:
— What are you doing, John? Why stop?
— To be on the safe side, we'd fill up the tank now for we _______run out of gas on the way
A. must B. will C. might D. should
【回答】
C
知識點:情態動詞
題型:選擇題
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