题目内容
( )3. Mr. Black went back toAmerica
the morning of Wednesday, January 8th ____ 10： 00.
A. on; at B. in; at
C. on; on D. in; on
3. A表示"在具体某一天的早晨、下午、晚上"用介词on;具体时刻前用介词at。
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