“They knock the doors and windows.”中有什么错误

they were i______ by a knock at the door They knock door to door for hlep knock at the door造句 finally they crossed the river__(succeed) he came in without __(knock) at the door one night,they sit down for dinner and there is a knock at the door. Listen:Someone ______(knock) at the door. knock on the door 同义句 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? Who is_______(knock)on the door? Who is_______(knock)on the door? knock at the door 和 knock on the door有什么区别吗详解,谢 knock at the door和knock on the door到底有什么区别? 关于knock at the door.为什么不是knock the door? at表示什么? can you hear someone _____(knock) on the door now Listen!There's someone_____(knock)at the door. Would you please ____________(not knock)on the door? Listen!There's someone_____(knock)at the door. 英语改错 “Please knock the door before entering.”