A balloon             as it is filled with air.
#102647
A
is increased
B
increases
C
expands
D
is expanded
推荐题目
I want to buy that kind of cloth because I _____ the cloth ____ well. 
#104487
A
have told; washes
B
have been told; washes
C
was told; washed
D
have been told; is washed
We had hoped that you would be able to visit us, but you _____.
#103721
A
didn’t
B
hadn’t
C
needn’t
D
would not have