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[单选题]
I _____my wallet when I was shopping in the store.
A
must have dropped
B
should have dropped
C
could drop
D
ought to have dropped
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参考答案
试题答案：
A
答案解释：
解题思路：A。本题考查情态动词表示推测的用法。must have done sth.表示对已经发生的事情的肯定猜测。这道题是对过去所发生的事情的推测.因此应选择A。
【参考译文】我肯定在那个商店里买东西的时候把钱包丢了。
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