问题:
My mother heard her ________ the piano in the next room at 10:00 last night.
[ ]
A. played
B. to play
C. playing
D. plays
My mother heard her ________ the piano in the next room at 10:00 last night.
B. to play
C. playing
D. plays
[ ]
A. played B. to play
C. playing
D. plays
参考答案: