John _______ all day before he down to eat something. A. had been working / sat B. will have worked / has sat C. is working / sits D. has worked / will sit

John _______ all day before he    down to eat something.

A. had been working / sat       
B. will have worked / has sat
C. is working / sits    
D. has worked / will sit

Trả lời

Chọn đáp án A

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