The changes in our chemistry lab will cost quite a lot, ____ they will save us money in the long run. 
#80217
A
or
B
since
C
for
D
but
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 It was several years ________ I realized ________ David had lied to me.
#30066
A
when; that
B
that; when
C
before; that
D
until; why
 __________I see him, he looks sad.
#31022
A
Every now and then
B
Every now and again
C
Every so often
D
Every time
I can’t find a proper dictionary _______ I can turn in my study.
#33890
A
to which
B
up which
C
on which
D
for which