题目内容
【题目】We must ________ make sure everything is ready. Or we may miss it.
A. slowly B. exactly C. quietly D. directly
【答案】B
【解析】
句意：我们必须确切地确定一切都准备好了，否则我们可能会错过它。A. slowly慢慢地；B. exactly确切地；C. quietly悄悄地；D. directly直接地；根据make sure everything is ready. Or we may miss it可知，是确切地；故选B
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