I am a League member. I volunteer my time ___________ others. 
#48828
A
help
B
to help
C
helping
D
helped
推荐题目
When the teacher came in, he saw some boys _______ behind Daniel, _______ the computer games. 
#50360
A
sit, watching
B
sitting, watching
C
sit, to watch
D
sitting, watched
We are busy__________ the final exams.
#51125
A
to prepare for
B
preparing for
C
preparing
D
preparing with
Julia Morgan has just finished ____ her last movie.
#49926
A
make
B
makes
C
made
D
making
Every day the boss makes him_____ 12 hours.
#49981
A
work
B
to work
C
working
D
works
I used to ______ English in the evening. Now I’m used to ______ itin the morning.
#48401
A
reading; read
B
reading; reading
C
read; reading
D
read; read