单句改错 who is the men knocking at the door

题目

单句改错 who is the men knocking at the door

答案

把men改为man,把介词at改为on
因为动词用的是is,表示单数,而men是复数形式,应该改为man,单数形式.
敲门,knock on the door,而不是 knock at.
祝进步