There is a lot of air in loose snow, . A. this to keep the cold out B. that keep the cold off——青夏教育精英家教网—

摘要： There is a lot of air in loose snow, . A. this to keep the cold out B. that keep the cold off C. which keep the cold out D. it to keep the warm in

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从所给的四个选项中选择最佳答案

There is a lot of air in loose snow, ______．　　　

[　　]

A．this to keep the cold out　　　B．that keep the cold off

C．which keeps the cold out　　　D．it to keep the warm in

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