When did he leave for China?（）a sWhen did he leave for China?（）a sunny morning .A.In B .At C.On D.By应该选c吗?

When did he leave for China?（）a sWhen did he leave for China?（）a sunny morning .A.In B .At C.On D.By应该选c吗?
When did he leave for China?（）a s
When did he leave for China?
（）a sunny morning .
A.In B .At C.On D.By应该选c吗?

When did he leave for China?（）a sWhen did he leave for China?（）a sunny morning .A.In B .At C.On D.By应该选c吗?
特定的某天介词用on.不特定就用in.

c

c

你觉得呢？

C

是啊，具体时间前用on

嗯啊

C