The effect of the epidemic upon sustainable development is one of the issues U.S.AID will get down to in the future. The epidem

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问题 The effect of the epidemic upon sustainable development is one of the issues U.S.AID will get down to in the future.
The epidemic has been spreading very fast over the past eight years.

选项 A、 
B、 
C、 

答案A

解析
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