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Bats are surprisingly long-lived creatures, some _____ a life span of around 20 years.
A.having B.hadC.haveD.to have
A

试题分析:考查独立主格结构。分析句式结构可知,这是一个简单句,中间用逗号分隔,所以后半句是对前半句的补充说明,some是逻辑主语。其后应跟非谓语动词形式,由于some与have之间是逻辑上是主谓关系,所以用现在分词形式,构成独立主格结构。句意:蝙蝠是令人吃慷的长寿动物,有些蝙蝠的生命周期达到大约20年。
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