One way for students to prevent H7N9 flu virus is to open the windows of the classroom to allow the air to ________.
#13540
A
accumulate
B
circulate
C
illustrate
D
accelerate
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 ---Can I help you, madam?---I’d like to buy ____eggs.
#14346
A
scores of
B
two scores of
C
two dozens of
D
three scores of
All those second-hand cars are sold at                  before
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A
40%as lower price as
B
40%as low a price as
C
as 40%low price as
D
40%lower price than