问题
选择题
The library is full of students ____ for the coming exam. [ ]
A. busily prepared
B. busy preparing
C. busily prepare
D. are busy preparing
答案
答案：B
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The library is full of students ____ for the coming exam. [ ]
A. busily prepared
B. busy preparing
C. busily prepare
D. are busy preparing
答案：B
