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【单选题】
Once harm ______ to the environment, it takes years to have the system recovered.
A.
does
B.
is done
C.
will be done
D.
be done
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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】_____ in a heavy rain, the teacher fell ill and couldn’t but ______ for a leave.
A.
Caught; to ask
B.
Catching; ask
C.
Catching; to ask
D.
Caught; ask
【单选题】________you are grown up, you should not rely on your parents.[ ]
A.
Now that
B.
Before
C.
Although
D.
As well as
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A.
not more than
B.
less than
C.
more than
D.
no more than
【单选题】How much time do you often spend _________ English every day?
A.
to practice speaking
B.
practicing to speak
C.
on practicing to speak
D.
practicing speaking
【单选题】Meeting a stranger to travel is different from traveling with friends. The former holds _____ surprises. [ ]
A.
less
B.
much
C.
more
D.
fewer
【单选题】Parents,of course,will do everything they could to ________ their children from harm.[ ]
A.
defend
B.
convince
C.
overcome
D.
reduce
【单选题】(2014·北京东城区高三教学统一检测)In his speech，he said that it was his primary school teachers that he was fond of________influenced his whole life.
A.
what
B.
which
C.
as
D.
who
【单选题】The soldier was of running away when the enemy attacked.[ ]
A.
scolded
B.
charged
C.
accused
D.
punished
【单选题】____ himself with necessary knowledge and skills, Tom went to the job market with much confidence．
A.
Equipped
B.
Equipping
C.
Having equipped
D.
Being equipped
【单选题】Mary was born in 1752 in a rich family in _____ is now the state of Virginia.
A.
which
B.
where
C.
that
D.
what