2. 外语
  3. I______my wallet when I was shopping in the store.

I______my wallet when I was shopping in the store.

admin2019-02-22  1.2K+
问题 I______my wallet when I was shopping in the store.
选项 A、must have dropped
B、should have dropped
C、could drop
D、ought to have dropped
答案A
解析 该句从句是过去时态，因此应该用dropped，因此选A，其他选项不符合题意。
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成人本科学位英语

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