When I walked past his house, I heard him _______.
#50226
A
to sing
B
sang
C
sings
D
singing
推荐题目
There is a paper factory _____ waste water into the river nearby.
#48738
A
poured
B
pour
C
pours
D
pouring
It is better for you to walk down the stairs instead of ________ the elevator.
#48391
A
taking
B
to take
C
take
D
taken
Please ask your friends___________so much noise．
#49587
A
not to take
B
don’t take
C
not to make
D
don’t make