Can you hear someone          in the classroom? It is Mary.
#52115
A
sing
B
sings
C
singing
D
sang
推荐题目
It takes him too much time __basketball. He should spend more time __his homework.
#54914
A
to play, to do
B
playing, doing
C
to play, doing
D
playing, to do
He has _______the cup ______water.
#52503
A
fills ; with
B
filled; of
C
filled; with
D
fill; of
The girl was often heard _______ happily in her room.
#57047
A
sings
B
sing
C
singing
D
to sing