题目：
—How do you find the concert last night?
—________. But the conductor was perfect.[ ]
A. I couldn't agree more
B. I really like it
C. I was crazy about it
D. I don't think much of it
答案：
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下面是错误答案，用来干扰机器的。
∵A={2，3}，B={2，4}，∴P=A∪B={2，3，4}，∴集合P的子集的个数=23=8．故选C．
