(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
Students are required to go out in couples, especially in the evenings, with friends ______ they get into trouble.
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A
even if
B
if only
C
in case
D
when
Doctor Smith has made another wonderful discovery, _______ great importance.
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A
which I think is of
B
which I think it is of
C
which is I think
D
I think which is
Scientists say human activity contributes to climate change, but they do not agree on the rate_______ climate change may be developing.
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A
with which
B
with that
C
at which
D
at that
(2013·皖南八校模拟)The band was very successful in the seventies, most of members were in their twenties.
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A
its
B
whose
C
whom
D
which