keep a civil tongue - keep your chin up - keep an eye on

keep one’s head above water - keep up the good work

1. Don’t get depressed!. Things will get better.
2. Please don’t talk like that to each other!
3. Well done! We couldn’t have done it better ourselves.
4. After her financial problems, she can hardly.
5. I willon you

karst - keystone - klystron - karakul - kidnap 

1. Intermittent drainage, underground watercourses and vast cave systems are features of the
2. He was charged with theof a 12 year-old boy. 
3. Within families filial piety was theof morality. 
4. We paid special attention to raising the quality of the multicavity
5. sheep are currently listed as endangered.