问题
选择题
Nobody plays with me as all of them _____ preparing for the exam.[ ]
A. work on
B. are busy
C. are busy with
D. work out
答案
答案：B
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Nobody plays with me as all of them _____ preparing for the exam.[ ]
A. work on
B. are busy
C. are busy with
D. work out
答案：B