knocking
- Listen! Someone is knocking _________ the door.[ ]
- Someone is knocking at the door. Is it Ann?—It _____ be her. She is giving a performance at the theatre now.
- Someone is knocking at the door. Is it your brother?—No, it be him. He’s gone to Hunan.
- There is someone knocking at the door.- It ______ be Jimmy, he has gone to ShangHai .
- Is Ann knocking at the door?— No, it ______ be Ann. She has gone to Beijing.
- Someone is knocking at the door. Who may it be? —It ______ be Tom. He is still in the school.
- Someone is knocking at the door. It my sister. It’s time for her to be back.
- Someone is knocking at the door.- It ______ be Tom. He is still in the school.
- Who’s knocking at the door?—Maybe wanting to sell some new products.