---I haven’t got the reference book yet, but I’ll have a test on the subject next month. ---Don’t worry. You ____ have it by Friday.

Go and do it right now, and you _____ have my help when in trouble.

— Is there an express to Beijing tonight? — There ______ be, but you’d better call the booking office to make sure. 

—Is Mary coming by plane?—He should ,but he _____not. He likes traveling by train.

—Listen! Peter is singing in the classroom! —It _____ be him. He has gone back to his hometown.