When I saw Mary,she ______ on the piano.选项:a、is playing b、plays c、 was playing d、played
问题描述:
When I saw Mary,she ______ on the piano.选项:a、is playing b、plays c、 was playing d、played
答
When I saw Mary,she ______ on the piano.选项:a、is playing b、plays c、 was playing d、played