-How do you know that she likes singing?-I often hear her      after class.
#50786
A
to sing
B
singing
C
sing
D
sings
推荐题目
—When __________ he __________ fishing?—Next weekend.
#49641
A
was; going
B
is; going
C
does; go
D
did; go
They are willing __________ in my firm.
#49803
A
work
B
working
C
to work
D
worked