They were waiting ___.A.on the doctor's B.at the doctor's C.in th_英语解答

They were waiting ___.A.on the doctor's B.at the doctor's C.in the doctor D.at the doctor

人气：478 ℃　时间：2020-05-19 01:22:18

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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