What ________ since 8 am up to now? A. you have been doing B. have you been doing C. have been you doing D. have been doing you

What ________ since 8 am up to now?

A. you have been doing  
B. have you been doing
C. have been you doing      
D. have been doing you

Trả lời

Chọn đáp án B

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