单选题
By 2050 the world will have about 2 billion people aged over 60, three times ______ today.
A、
as much as
B、
as that of
C、
as many as
D、
as those of
【正确答案】
C
【答案解析】
[解析] 注意英语中倍数的正确表达法“three times as much/many as”，“much”与“many”的区别主要由前面的名词是否是可数名词而决定。本句中，前面为可数名词“2 billion people”，所以应该用“as many as”。
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