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The teacher spoke slowly ________ the students might take notes.
#30123
A
while
B
since
C
even though
D
so that
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You can go out, _________you promise to be back before 11 o'clock.
#31525
A
as far as
B
so far as
C
when
D
as long as
I have many friends, _____ some are businessman.
#33775
A
of them
B
from which
C
who of
D
of whom
—Why do you look worried?— Because what I am really concerned about is _____my friend can do me a favor or not..
#32847
A
although
B
whether
C
when
D
where
What an unforgettable experience! I’ll write it down ______it is till fresh in my  memory.
#31356
A
before
B
so that
C
while
D
until
---How long is it _____ we last met?--- About five years. You haven’t changed much.
#32757
A
before
B
since
C
when
D
that