Ben was busy taking a training class. we had to wait for himfor half an hour..A. soB. ifC

发布时间：2020-08-21 11:52:57

Ben was busy taking a training class.      we had to wait for himfor half an hour..
A. so
B. if
C. or
D. but

网友回答

(答案→)A. so
B. if
C. or
D. but
解析：本题难度适中，前后句子是因果关系，答案选A。
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