The population of many big cities ______ (double) in the past three years.has do

游客2024-07-02  15

问题 The population of many big cities ______ (double) in the past three years.

选项

答案 has doubled

解析 句意:过去三年许多大城市的人口翻了一翻。强调对目前造成的影响和结果。
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