Bats are long-lived creatures, ______a life-expectancy of around 20 years.

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问题 Bats are long-lived creatures, ______a life-expectancy of around 20 years.

选项 A、some have
B、some having
C、some of them have
D、some of which having

答案B

解析

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GCT工程硕士（英语）

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