The population of many Alaskan cities has ______ doubled in the past three years.

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问题 The population of many Alaskan cities has ______ doubled in the past three years.

选项 A、larger than
B、more than
C、as great as
D、as many as

答案B

解析 more than表示“比……更……”,用作副词。在本句中,它用来修饰谓语动词doubled。 larger than是比较级用法,意思是“比……大;比……多”;as great as和as many as是同级比较,意思是“与……一样多”,A、C和D都需要比较对象,而原句中没有,因此,这三项都是错误的。
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