问题描述：
The population of many Chinese cities has _________ doubled in the past 30 years.
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考点提示：副词,副词的比较级,疑问副词,连接副词
最佳答案： | B |
| 略 |
The population of many Chinese cities has _________ doubled in the past 30 years.A．larger thanB．more
The population of many Chinese cities has _________ doubled in the past 30 years.A．larger thanB．more
最佳答案： 