Populationexpertssaythatby2050

更新 2022-09-03
科目英语
题型单选题
难度中等
浏览 1414

Population experts say that by 2050 the world will have about 2 billion people aged over 60,____as today.

A．as three times	B． three times as many
C． three times many	D． three times many as

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