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【单选题】
The police tried _____ to break up the protest crowds.
[ ]
A.
in a vain
B.
in vain
C.
in the vain
D.
for vain
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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Those students argued ________each other ________whether the research into human cloning should be carried out.[ ]
A.
for; over
B.
to; about
C.
of; over
D.
with; about
【单选题】I still remember ______ to the Famen Temple and what I saw there．
A.
to take
B.
to taken
C.
taking
D.
being taken
【单选题】We should pay much attention to the plants which are .
A.
dying away
B.
dying out
C.
dying down
D.
dying off
【单选题】We were swimming in the lakesuddenly the storm started.
A.
when
B.
while
C.
until
D.
before
【单选题】The new group of students is better-behaved than the other group who stayed here ________．
A.
early
B.
earlier
C.
earliest
D.
the earliest
【单选题】The classroom with windows_____ north wants_______ badly, so we’d better move the students into the classroom next door．The classroom with windows_____ north wants_______ badly, so we’d better move th...
A.
facing; repaired
B.
faces; repairing
C.
faced; to be repaired
D.
facing; repairing
【单选题】When it is your turn to talk, what I want to tell you is ______you can show respect by making sure the listener understands ______ you are saying and is interested.
A.
that；what
B.
this；which
C.
where； that
D.
which； when
【单选题】-- Could you please buy me an MP4 as well as a digital camera, Mum?-- You can choose , not both, my dear.
A.
each
B.
any
C.
either
D.
none
【单选题】You can’t be ______ when you camp _____ a high altitude, ________ the air is thin．
A.
enough careful; at; which
B.
too careful; at; where
C.
careful enough; on;at which
D.
too careful; on; that
【单选题】By the time he realizes he ______ into a trap, it'll be too late for him to do anything about it. [ ]
A.
walks
B.
walked
C.
has walked
D.
had walked