(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.
#11928
A
difference
B
comparison
C
connection
D
barrier
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It is sometimes of great _____ to explain to the patient what is happening.
#13888
A
technique
B
signal
C
importance
D
freedom
Old-fashioned phones matter when wireless networks _____in disasters.
#13847
A
turn down
B
turn out
C
break down
D
break out
Each member country of WTO must ________ its laws and regulations and compete on the principle of fairness and cooperation.
#12121
A
submit to
B
cater to
C
correspond to
D
relate to
The house rent is expensive. I’ve got about half the space I had at home and I’m paying _________ here.
#14078
A
as three times much
B
as much three times
C
much as three times
D
three times as much