(2013·高考重庆卷)It’s not easy to change habits，________with awareness and selfcontrol，it is possible.
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A
for
B
or
C
but
D
so
推荐题目
Few people paid full attention to their health conditions ________ they were seriously ill.
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A
when
B
if
C
until
D
after
My mother is always warning me when I go out, “Don’t get off the bus ____it is stopping.”
#32320
A
until
B
before
C
while
D
After
Not once has she given in to any difficulty in her life and that's _____ she is a strongwilled woman.
#30565
A
why
B
when
C
because
D
where
We thought there were 35 students in the dining hall, ____, in fact, there were 40.
#32299
A
while
B
whether
C
what
D
which