George told Mary that he _______ what he was doing during the vacation. ( 章节：2 难度：3)
- A、had just been asked
- B、might asked
- C、had asking
- D、had just asking
正确答案:A
答案解析:有
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George told Mary that he _______ what he was doing during the vacation. ( 章节：2 难度：3)
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