Sally has been swimming ______ four hours.
#50710
A
for about
B
since
C
about
D
/
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－I think exercising every morning is good for our health.－Yes. I agree you.
#48179
A
to
B
with
C
at
D
for
Wei Fang is young，but she plays ping-pong ____ her mother.
#50705
A
as good as
B
as well as
C
as better as
D
as best as
Is there a TV _________your classroom? Yes, of course.
#48923
A
in front
B
in the front
C
in front of
D
in the front of