By the 2030s most people can to live at least 80 which is a big leap for mankind.A. expe

问题补充：

By the 2030s most people can to live at least 80, which is a big leap for mankind.

A. expect

B. desire

C. want

D. demand

答案：

(答案→)A. expect

B. desire

C. want

D. demand

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