---Listen! Someone is knocking at the door. Who _____it be?---It _____be Tom. He phoned to visit me this evening.
— ______ do you go to the gym? — Once a week.
Nowadays it’s very useful ______ a foreign language.
His English is as ______ as his Chinese.
— Did you see the film last night? — No, I ______ some shopping at that time.
— Do you want to play another game of cards? — I’d like to, but it’s getting late. I really ______ go.