what are you doing?a.I am doing morning exercises.b.I am going to school.选a还是b?为什么?
问题描述:
what are you doing?a.I am doing morning exercises.b.I am going to school.
选a还是b?为什么?
答
what are you doing?a.I am doing morning exercises.b.I am going to school.
选a还是b?为什么?