(2014年北京市西城区高三5月二模试题)25. The report aims to explain how these conclusions ______. 
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A
were reached
B
had been reached
C
have reached
D
had reached
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Mr Lin, a famous writer, _______ our school last week.
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visits
B
will visit
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is visiting
D
visited
If we _________ the earth, we must take action before it is too late. 
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will save
B
are to save
C
are about to save
D
are saving
 I don't think she ____what happens to her children.
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cares to
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cares about
C
cares for
D
takes care of
Can $ 500 _________ the cost of the whole trip?
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A
contain
B
cover
C
include
D
afford