Ben was busy taking a training class. ______we had to wait for himfor half an hour.. A. so B. if C. ...
2022-10-12 21:05:46 69次 北师大版八上unit 4 healthy living lesson 10 going to the doctor同步测试卷 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
Ben was busy taking a training class. ______we had to wait for himfor half an hour..
A. so B. if C. or D. but
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