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---How long is it _____ we last met?--- About five years. You haven’t changed much.
#32757
A
before
B
since
C
when
D
that
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 Sometimes people just believe what they see, ______the reality may be different.
#30770
A
as if
B
even though
C
since
D
unless
 She witnessed an accident ______ a minibus had a head-on crash with a taxi.
#30640
A
what
B
which
C
where
D
that
.A computer is so useful a machine ________ we can use everywhere.
#80155
A
that
B
which
C
as
D
what
He failed in the exam not only        his laziness but also        he didn’t listen to the teacher.
#31866
A
because; for
B
because of; because
C
as; for
D
for; since
People from the West like to use such expressions as “please” and “thank you” in cases ______ some people in Asia may not think it necessary.
#32094
A
what
B
which
C
that
D
where