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Most whales must come up for air after several minutes, a few can stay under wat

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Most whales must come up for air after several minutes, a few can stay under wat

Most whales must come up for air afterseveral minutes, _______ a few can stay under water for an hour or more.

A．while

B．or

C．for

D．so

 

试题答案

【答案】

A

【解析】

试题

标签：airforafterminutesseveral

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