【題目】-- Tom says he is too tired to go on.

-- He can’t. He ________ for an hour.

A. had worked B. has just worked

C. just worked D. has only been working

【答案】D

【解析】

試題分析：考查動詞時態(tài)。句意：湯姆說他太累了不能繼續(xù)了。他不可能這樣，他只工作了一個小時。從本題的語境中可以看出他不可能累的原因是：他從開始工作到現(xiàn)在僅僅才工作了一個小時，因此應該用現(xiàn)在完成進行時，故選D項。

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