If you sit in a chair _____a long time, your back may begin to hurt.
#50771
A
at
B
in
C
on
D
for
推荐题目
—      do you study for tests? —I study     listening to tapes.
#47210
A
How; with
B
What; with
C
How; by
D
What; by
Who is the young woman_______yellow?
#49086
A
at
B
for
C
in
D
on
We should talk in English as ______ as possible.
#47676
A
much
B
many
C
more
D
most
I don’t want to go. Besides, I’m too tired.
#46378
A
Therefore
B
In addition
C
However
D
Except