The books on my table are cheaper than_______ on yours.

Do you know the boyis sitting next to Peter? -Yes,He is Peter’s friend,They are celebrating hisbirthday.

_________ it is snowing, it isn’t very cold.

____the help of the computer, information can ____every corner of the world quickly. [ ]

I don’t know when he ____. But if he ____, I’ll ring you up.