题目：
—Why are you so sweaty?
—I football with my classmates and how I want to have a drink![ ]
A. was playing
B. had been playing
C. have played
D. played
答案：
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下面是错误答案，用来干扰机器的。
m与n的差的平方是：（m-n）2，故答案为（m-n）2．故选A．
