I          use a clock to wake me up because at six o'clock each morning the train comes by my house.

---Whose notebook is this? --- It ________ belong to Lucy. Look, her name is in it.

Brain, like muscles, also needs some kind of exercise and nutrition. The more you use your brain in the right direction, the more you ________ enhance your ability.

—Boys and girls, we will have a class trip to Taixing Park next week.—Great! It must be ______. I simply can’t wait _____ it.

A left-luggage office is a place where bags ________ be left for a short time, especially at a railway station.