When I walked past his house, I heard him _______.
#50226
A
to sing
B
sang
C
sings
D
singing
推荐题目
 My sister spends too much time ______computer games.
#48699
A
to play
B
play
C
plays
D
playing
Please ask your friends___________so much noise.
#49587
A
not to take
B
don’t take
C
not to make
D
don’t make