---Is he Johh? --- He’s DaveA. Yes, he is B. No, it isn’t C. No, he isn’t
Whatever you do, ________ is difficult if you put your heart into it.
My English teacher had a trip to the USA last summer. Which picture did she take there?
_______ a big party in our school in two weeks.
Every year lots of trees _______ to make our country more beautiful.
--Listen! Is it Linda singing in the next room? --No, it __________ be her. She is still in Shanghai.