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Smoking (know) ______ to increase a person’s risk of developing lung cancer.is k
Smoking (know) ______ to increase a person’s risk of developing lung cancer.is k
游客
2023-09-23
56
管理
问题
Smoking (know) ______ to increase a person’s risk of developing lung cancer.
选项
答案
is known
解析
本题考查被动语态的用法。smoking与know之间是被动关系,所以用被动语态is
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