Theywerewaiting___.A.onthedoctor'sB.atthedoctor'sC.inthedoctorD.atthedoctor
2021-12-30 49次 反馈错误 加入收藏 正确率 : 100%
题目内容：
They were waiting ___.A.on the doctor's B.at the doctor's C.in the doctor D.at the doctor
优质解答
选择B,在某个地点用at.
过去进行时,“他们正在诊所等待”.
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