Smoking (know) ______ to increase a person’s risk of developing lung cancer.is k

游客2024-06-30 52

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

转载请注明原文地址:https://tihaiku.com/zcyy/3656089.html

相关试题推荐

随机试题

最新回复(0)

Apersonisgenerallybelievedtoachievepersonalgrowthwhen______.[br]70.