she was out of the room, he took a quick look at the papers on her desk.
#30733
A
If
B
While
C
Though
D
Unless
推荐题目
I can’t remember how the tune goes, ______ I’ll recognize it when I hear it.
#30825
A
so
B
but
C
because
D
unless
The fire was finally brought under control, but not______ heavy damage had been caused.
#34805
A
before
B
after
C
since
D
until
Convenient ___private cars are for us, they may also cause traffic accidents and pollution.
#33185
A
while
B
as
C
if
D
since
He made a mistake, but he corrected the situation __________ it got worse.
#31740
A
until
B
when
C
before
D
as