______ does ______ take to play tennis? —-Let me see. About two hours.

The man on the photo looks like __________ from our company.-Yes, I know. It’s Mr. Hu.

Safety in school has been of great concern because of frequent reports about accidents _______ students got injured or killed while in school .

_____! Don’t give up. I am sure you can win the game.

I bet Mrs. Black will come to help us with the celebration if she ______ too busy tomorrow. [ ]