I'm so busy while he is _____ play. [ ]A. on B. at C. on the D. at the -高一英语

题目简介

I'm so busy while he is _____ play. [ ]A. on B. at C. on the D. at the -高一英语

题目详情

I'm so busy while he is _____ play.
[     ]
A. on
B. at
C. on the
D. at the
题型:单选题难度:中档来源:专项题

答案

B

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