—Why not ask Bob to join us in the school trip? —I can’t tell if he’s able to. He’s always wi

分类: 作业答案 • 2021-12-28 14:14:51

问题描述：

—Why not ask Bob to join us in the school trip? —I can’t tell if he’s able to. He’s always wi
h his work.A. careful B. familiar C. casual D. busy

答

D be busy in (doing)sth 忙于某事那是with啊额，sorry那选A.befamiliar with 熟悉…… becasual about 对……漫不经心，不能和with搭配