---Listen! Is Tom singing in the room? --- No, it ______ be Tom. He has gone to Paris.A. mustn’t B. needn’t C. can’t
-----you happy? -----.
I will go to the USA next week. Can you ________ my dog for me?
_______ your brother good at English?.
He likes playing football, so he wants to buy football.
The number of students in our class ______ fifty, but a small number of them ______from the country.