when i went to say goodbye to anna,she __the piano a.is playing b.plays c.was playing d.playedwhat college are you ___?a.in b.to c.for d.on
问题描述：
when i went to say goodbye to anna,she __the piano a.is playing b.plays c.was playing d.played
what college are you ___?
a.in b.to c.for d.on
答
选C was playing
表示过去进行时.
选a.in
固定端与in college在大学