问题
选择题
Had they known what was coming next, they ________ second thoughts.[ ]
A. may have
B. could have
C. must have had
D. might have had
答案
答案：D
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Had they known what was coming next, they ________ second thoughts.[ ]
A. may have
B. could have
C. must have had
D. might have had
答案：D