Choose the best particles to complete the sentences.

Choose the correct option.

You'd better keep [back|out|up|on|off|in] of my way.

Keep [back|out|up|on|off|in] the grass or you'll pay a fine!

Mike was silent, he kept all emotions [back|out|up|on|off|in].

Tony was kept [back|up|out|on|off|in] after classes because of his bad behaviour.