—Hi, Mary, you look very tired.—Yeah, I______for a whole week.

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问题 —Hi, Mary, you look very tired.—Yeah, I______for a whole week.

选项 A、worked
B、had worked
C、have worked
D、have been working

答案D

解析本题考查动词的时态。have been doing sth.是现在过去完成进行时表示最近一直干什么事情，强调持续性。根据句意，我已经持续工作了整整一个星期了。故正确的答案为D。

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