選擇B,在某個地點用at.
過去進行時,“他們正在診所等待”.
有幫助請及時采納
They were waiting ___.A.on the doctor's B.at the doctor's C.in the doctor D.at the doctor
They were waiting ___.A.on the doctor's B.at the doctor's C.in the doctor D.at the doctor
英語人氣：167 ℃時間：2020-05-19 01:22:18
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