I am a League member. I volunteer my time ___________ others. 
#48828
A
help
B
to help
C
helping
D
helped
推荐题目
My sister spends as much time as she can_______.
#48623
A
practicing to dance
B
practice to dance
C
practice dancing
D
practicing dancing
Try not _______every word.
#50267
A
to translate
B
translate
C
translation
D
translating
The life we were used to ________ greatly since 2002
#50668
A
change
B
changing
C
have changed
D
has changed
Does he prefer         football to         with his online friends?
#51359
A
playing, chat
B
play, chatting
C
playing chatting
D
play, chat