专四

单选题The ________ mortality rate had gone up greatly during the past 10 years.

A. infant 
B. maternal 
C. male 
D. middle-aged

参考答案:D进入在线模考
细节题。关键是听清了“…said the past mortality of people age between 35 t0 54 years old had gone up 58.8 percent during the past ten years…”就可以知道中年人的死亡率在大幅增长。

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