— Mike, where is Alice?
— She is still studying in the classroom. She ______ for three hours.

A. study
B. studied
C. studies
D. has been studying
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科目：初中英語 來源：同步題 題型：單選題

— Mike, where is Alice?
— She is still studying in the classroom. She ______ for three hours.
[     ]
A. study
B. studied
C. studies
D. has been studying

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