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— Mum, I have got a headache.
— You’d better go out and take a walk. You       in front of the TV too long. 


A. have been sitting
B. are sitting
C. sit
D. sat
A
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科目：高中英語 來源：江蘇期中題 題型：單選題

—Mum, I have got a headache.
— You’d better go out and take a walk. You       in front of the TV too long. 

[     ]
A. have been sitting
B. are sitting
C. sit
D. sat

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