While we were running on the playground, Jack suddenly stopped____ and lay on the ground,so we all stopped_____ what was wrong with him.

——Oh, I had a terrible toothache.——You’d better    see a dentist and have your bad teeth     out.

The teacher always tells us not ___ any chance because it can help you grow up.

She  said _______ others changed  her life .

I’d like ______ your brother.