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 Don’t leave your seat ________ all the papers have been collected by the teacher.
#55185
A
after
B
when
C
since
D
until
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Planes will be very large______ flying will be very cheap.
#56584
A
because
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so
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but
D
and
---May I surf the Internet now?  ---No,______ you have finished doing the dishes.
#57488
A
unless.
B
if.
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The boys seldom eat snacks ______the girls often eat them.
#55553
A
and
B
but
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or
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____________ Davy called me, I was sleeping.
#55166
A
Until
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When
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 — Can you tell me ______ it is from here to the Summer Palace?— Let me see. It's about 15 minutes' ride.
#57747
A
how long
B
how soon
C
how much
D
how far