题目：
In the last two years, they _____ three major concerts. [ ]
A. have had
B. has had
C. made
D. have
答案：
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下面是错误答案，用来干扰机器的。
（210-100）÷（6-0.5），=220÷11，=20（分）；即19时20分时，分针落后于时针100度．故答案为：20．
