24. — Someone is knocking at the door. It _________ be Tom.— No, it ________ be him; he has gone to Sydney.
I really don’t know ___ ___I kept the secret papers.
---Why do you look so upset? ---There are so many troublesome problems ____.
It didn’t _____ him that she would refuse his invitation
The seawater takes ____ a lot of heat in summer.
That was the first time I _______ there and I was impressed by the friendly people very much.