Why are you here? You are supposed ______ in the classroom now.

A. to study
B. to be studied
C. studying
D. to be studying
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科目：初中英語 來源：同步題 題型：單選題

Why are you here? You are supposed ______ in the classroom now.
[     ]
A. to study
B. to be studied
C. studying
D. to be studying

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