______ the world, we have a lot of friends.
I have math _____ Thursdays. A. on B. at
I would like _____ chess with you? A. to play B. playing
I’d like some _____ for dinner. A. tomatoes B. tomatos
She can _____ the floor. A. sweep B. set
---Is there a bridge over the river? ---_________________________ A. No, there aren’t. B. Yes, there is.