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

游客2023-09-18 52

问题 Smoking (know) ________ to increase a person’s risk of developing lung cancer.

选项

答案 is known

解析 smoking与know之间是被动关系，所以用被动语态is known。动词的过去分词形式一般是在原形后面加-ed，但也有一些词的变化比较特殊，需特别记忆，如know—known， begin—begun等。

转载请注明原文地址:https://tihaiku.com/zcyy/3024097.html

相关试题推荐

随机试题

最新回复(0)

TracysaidtheworkwouldbedonebyJuly,______personallyIdoubtverymuch.A、i