knock at the door敲门应该是knock at the door,有时也看到有用knock on the door的_英语解答

knock at the door
敲门应该是knock at the door,
有时也看到有用knock on the door的,还有是不是可以直接说“knock the door"呢?

人气：339 ℃　时间：2020-03-29 14:19:30

解答

习惯用knock at the door