A good rest between classes ________ recover brain power to its best and make us perform better in class later.

— Where’s Lucy ? —  She ________ in the office. I saw her there just now.

—Have you invited Alice to our party?—Yes. But she _____ come; she is busy nowadays.

 Haven’t I told you already that you ___ have my answer tomorrow morning?

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