问题
选择题
The library's study room is full of students _______ for the exam.
A．busily prepared
B．busy preparing
C．busyly prepare
D．are busily preparing
答案
答案：B
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The library's study room is full of students _______ for the exam.
A．busily prepared
B．busy preparing
C．busyly prepare
D．are busily preparing
答案：B