单项选择题

One of the things we have to do to prevent a pandemic is to make sure people understand and know what they can do to minimize the commotion.

A. command

B. collusion
C. turmoil

D. tutelage
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单项选择题
Initially his book did not receive much attention, but two weeks after the critic’s review appeared in the newspapers, it climbed to the best sellers’ list.()

A. At first
B. First of all
C. At first sight
D. From the first
单项选择题
Attempts have been made for nearly three decades to increase the amount of precipitation from clouds by seeding them with salt or silver iodide.()

A. Devices
B. Hypotheses
C. Efforts
D. Suggestions
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