Definition: If you keep something to yourself, you do not tell anyone else about it. Level: C2
她通常把自己的意见藏在心里。
She usually ___keeps her opinions ___to ___herself.
她把想法藏在心里，她最好的朋友是她的日记。
She ___kept her thoughts ___to ___herself, her best friend being her diary.
你应该对机密信息保密。
You should ___keep confidential information ___to ___yourself.
