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12、By the year 2015, the world population will be _____ today.

A.as twice as what it is                    B.twice what it is

C.twice as it is                      D.twice of what is

12、B

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By the year 2015, the world population will be _____ today.

A.as twice as what it is                    B.twice what it is

C.twice as it is                      D.twice of what is

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