单项选择1.Her mother asks her to practice___the piano every night .(play)
问题描述：
单项选择1.Her mother asks her to practice___the piano every night .(play)
1.Her mother asks her to practice___the piano every night .A playing B plays C to play D play
2.He often spends three hours____his homework.A.does B.in C.doing D.to do并请说明理由!
答
1.playing,
2.doing,