Let’s go and play ______ ping-pong. I don’t want to play ______ violin.

Sorry, Doctor Smith isn’t here right now.—May I ____ a message on his desk?

How are you feeling here? — It’s quite hot. I don’t know _____ to go or stay.

Cars were invented in .

I need something for cutting the paper. — Oh, you want a knife? OK, I’ll get ______ for you.