--Listen! Tom is singing in the next room.--It _______ be Tom. He has gone to Shanghai.
---- Which would you like, tea or coffee?---- _______. I really don’t mind.
When the students were playing games on the playground, Jim suddenly stopped ______and began to cry, so we stopped _______ what was wrong with him.
---- You should be _______ careful when you take the chemistry exam.---- I agree. In this way, I will make _______ mistakes.
Tom is weak in physics. He always feels _______ before he takes a physics test.
---- There is _______ interesting book on the teacher’s desk.---- Oh, ______ book is Wei Fang’s.