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How dirty the floor is! You should have someone _____ it at least twice a day.
A．mopB．to mopC．mopping D．mopped
A

試題分析：考查have的用法，have sb do sth意思“讓某人做某事”，所以選A，句子意思“地板好臟啊，你本應(yīng)該讓某人一天至少拖地兩次”
點評：have的用法是�？純�(nèi)容，只要知道它的用法，have sb do sth意思“讓某人做某事”，就很容易選擇了
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