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---______do the students exercise a week ?---Once or twice.
#43559
A
How often
B
How long
C
How
D
How many times
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You should keep working hard ________ you have passed the exam.
#37472
A
if
B
because
C
when
D
even though
 _____ number of the students is 4，0000  , much more than last year.
#36034
A
The
B
A
C
/
D
Its
Why not _____your teacher for help when you can’t finish______the story by yourself.
#35634
A
to ask, write
B
to ask, writing
C
ask, writing
D
asking, to write
  Show your ID card, ________ you won’t buy the ticket.
#35453
A
and
B
but
C
or
D
So
—He has 2 friends. One is a driver,_______ is a doctor..
#36290
A
the other
B
others
C
another
D
another one