tell mary that there`s someone( )for her at the door a waiti

如何划分句子成分?Tell Mary that there's someone ____ for her at door Tell Mary that there's someone _______for her at the door. Tell Mary that there's someone _____for her at the door. there's someone knocking at the door.等于什么 There's someone ___ the door. ----There's someone at the door.Who____ it be Is it the post 单选oh,there's someone knocking at the door-must be your neigh 英语 .There's someone at the door.Can you go and see who _____ 一道英语填词题There is someone knocking at the door.Please go and s 1.— There’s someone knocking at the door.Who could _____ be? There’s someone at the door.为什么可以翻译成“有人在敲门”? —Oh,there's someone knocking at the door.—______ must be tha