You _______ cross the road when the traffic lights are red.

The book ________ be Tom’s. Look! His name is on it.

— Can I pay the bill by check?— Sorry, sir. According to the rules of our hotel, the payment ______ be made in cash.

Days later, my brother called to say he was all right, but _______say where he was.

—We will go to the Wushan Square this afternoon, why not take a bus? —We ________ take a bus , it’s only one kilometer or more.