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It was some time _______ I realized the fact that I had been cheated by the salesman.
#31376
A
until
B
before
C
unless
D
since
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How strange it is　　　the students are so quiet in the classroom!
#30612
A
where
B
when
C
whether
D
that
He never thought that his success came____ he least wanted it．
#31350
A
until
B
since
C
when
D
while
A few people were killed in the fire, but _____ were saved.     
#33787
A
the most
B
most of them
C
most of whom
D
most
 She thought I was praising her child，_____，in fact，I was scolding him for his bad behaviors　at school.
#31272
A
what
B
while
C
so that
D
therefore
The medicine works more effectively        you drink some hot water after taking it .
#80686
A
as
B
until
C
although
D
if