The World Wide Web is sometimes jokingly called the World Wide Wait because it ______ be very slow.

e countries where there is notenough coal, water is used to ____ electricity.

Jason, would you please ________ this notice—No problem. I’ll do it right away.

It is our ________ to look afterour parents when they get old.

How many girls are there in your class — _______ them _______ over twenty.