I’m very tired. I on the night shift for several weeks.A. workedB. had workedC. have be

问题补充：

I’m very tired. I on the night shift for several weeks.

A. worked

B. had worked

C. have been working

D. have worked

答案：

A. worked

B. had worked

(答案→)C. have been working

D. have worked

解析：指过去到现在一直进行的动作。由于“上夜班到现在仍未终止”，故应用完成进行时而不用现在完成时。