Do you enjoy __________ on the Internet?
#49165
A
surfing
B
surf
C
to surf
D
surfed
推荐题目
I mustn’t give up __________ English easily. 
#49048
A
to study
B
studying
C
studied
D
study
Don’t keep the boy __________ in the rain. He will fall ill.
#50356
A
stand
B
to stand
C
standing
D
from standing
Do you need him _______ all the things?
#50529
A
to carry
B
carry
C
carrying
D
carries