---Could I go boating this weekend, Dad?---Yes, you ________. But you ________ come back before lunch.

----Shall I go and buy two more bottles of beer? ----No, I’ve already bought them yesterday. That           be enough for us two.

—Could you please come to the museum with me this afternoon?—Sorry，I ________．I have to take a piano lesson at 2 pm．

If the students who killed themselves had only been more confident, their deaths ________.

    One of the few things you ______ say about English people with certainty is that they talk a lot about the weather.