We can’t do well in examination _________ we study hard in school time.
#56352
A
if
B
and
C
since
D
unless
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I was _________ tired _________ I fell asleep as soon as I lay down.
#57434
A
too; to
B
so; that
C
such; that
D
enough; that
—How about going hiking this weekend?—Sorry. I prefer ________ rather than ________. 
#58573
A
to stay at home;go out
B
to go out;stay at home
C
staying at home;go out
D
going out;stay at home