A girl calling herself Mary is waiting outside; _____ she come in now?

“Mike is often absent from class.” “Tell him he _     _ answer for it if he goes on behaving like that.”

You can't imagine that a well－behaved gentleman ________ be so rude to a lady.

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

—Have you checked the engine? —Yes, I did twice; there ______ be anything wrong with the car.