Someone called me up in the middle of the night,but they hung up I could answer the phone.

发布时间：2020-08-17 13:40:32

Someone called me up in the middle of the night,but they hung up     I could answer the phone.
A. as
B. since
C. before
D. until

网友回答

A. as
B. since
(答案→)C. before
D. until
解析：这句话的意思是“午夜有人给我打电话,但是在我接电话之前,他们又挂了”。
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