(2013·重庆，23)It's not easy to change habits，________ with awareness and self－control，it is possible.
#30482
A
for
B
or
C
but
D
so
推荐题目
___ you know the rules of swimming, you will be able to swim well.
#80368
A
Before
B
While
C
Though
D
Once
Was it because of the heavy snowstorm in Europe the flight had to be put off?
#32608
A
which
B
so
C
why
D
that
---- Our holiday cost a lot of money.---- Did it ? Well, that doesn’t matter_______ you enjoyed yourself.
#31062
A
as long as
B
unless
C
as soon as
D
though
—Where's that report?—I brought it to you ________ you were in Mr.Black's office yesterday.
#30686
A
if
B
when
C
because
D
before
___________you try to do something beyond what you have already mastered, you will never grow.
#30739
A
Since
B
When
C
Though
D
Unless