--- Whose book is this ?---It _____ Tom’s . There is his name on it .A. can’t be B. must be C. can be
—______________, Kate? —I can’t find my ball.
There’re not ______ reading rooms here.
—_________ is your father? — Forty.
—Is she your sister?—_______. She’s my English teacher.
—Is this your dog, Nick? —Yes, ____________.