Bats are surprisingly long-lived creatures, some______a life span of around 20 years.

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问题 Bats are surprisingly long-lived creatures, some______a life span of around 20 years.

选项 A、having
B、had
C、have
D、to have

答案A

解析 分析句子结构,句中没有连词,故空处应填非谓语动词,构成独立主格结构。had和have是谓语动词形式,故排除。to have表将来;having表伴随。根据句意,本句为一般陈述语气,故选A。
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