单项选择题

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单项选择题
I hope all the precautions against air pollution, ______ suggested by the local government, will be seriously considered here.
A. while
B. since
C. that
D. as
单项选择题
Only ten to twenty percent of cold viruses are transmitted by carders, who, sneezing and coughing, ______ the viruses into the air.
A. spray
B. sprinkle
C. spread
D. sprout
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