Mum you really need to have a rest! You in the kitchen ever since you came back home thre

问题补充：

Mum, you really need to have a rest! You in the kitchen ever since you came back home three hours ago.

A. had worked

B. were working

C. have been working

D. worked

答案：

A. had worked

B. were working

(答案→)C. have been working

D. worked

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