(2013·高考湖北卷)Carbon dioxide，which makes a________between us and the sun，prevents heat from getting out of the atmosphere easily，so the earth is becoming warmer.
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A
difference
B
comparison
C
connection
D
barrier
推荐题目
Eye doctors suggest that a child’s first eye exam____at the age of six months old.
#11648
A
was
B
be
C
were
D
is
If better use is ____ your spare time , you will make greater progress.
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A
used for
B
spent
C
made of
D
taken
— Linda, can you give me some tips on doing this project? — Sorry, but I’m not the person to ______ how the job should be done.
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A
determine
B
persuade
C
recommend
D
influence
Internet users are warned to be ________ about giving away personal information to strangers.
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A
cautious
B
anxious
C
particular
D
sensitive