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

单项选择题

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。