I often hear him ______.Today when I pass(经过)the classroom, I hear him ______again .
#49624
A
sing; singing
B
singing; sing
C
singing; singing
D
sing; sing
推荐题目
---How did you work out the difficult chemistry problem?--- I worked it out by ________.
#49667
A
working with a group
B
think very hard
C
ask the teacher for help
D
doing oneself
It’s better ____ your voice down in public places.
#49478
A
keeping
B
to keep
C
keeps
D
keep