单项选择题

The expected life-span of Beijing residents has gone up by （） compared with that a decade earlier.

A. 1.5 years
B. 1.4 years
C. 1.2 years
D. 1.1 years

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单项选择题

A. $ 100.
B. $ 50.
C. $ 200.
D. $ 150.

单项选择题

A. Mongolia.
B. South Korea.
C. lran.
D. Qatar.

The expected life-span of Beijing residents has gone up by （） compared with that a decade earlier. 您的浏览器不支持 audio 元素。