Do you know ______ this i-pad belongs to? —Let me see. Oh, it’s ______.

Who’s that man in our classroom? It ________ be Mr. Brown. He is much taller.— You mean the man in white? He is an exchange student from England.

He plays basketball so well! Who taught _______?—He learnt it by _______.

Hello, grandpa. I am so happy ________ back home during the winter holidays.

Do you enjoy on the beach?