2. 外语
  3. He______ unwisely, but he was at least trying to do something helpful. （1999年考试真题）

He______ unwisely, but he was at least trying to do something helpful. （1999年考试真题）

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问题 He______ unwisely, but he was at least trying to do something helpful. （1999年考试真题）
选项 A、may have acted
B、must have acted
C、should act
D、would act
答案A
解析 本题考点为情态动词may+have done，表示对过去某种情况的推测。
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