Question

don't t() others the secret

That is a secret between us．Please don't tell it to others．（ 改写句子，句意不变）
Don't let others knows the secret．Please___ it___ ourselves．

Answer 1

答案：keep to．原句Please don't tell it to others．表示不要告诉别人也就是保守秘密，keep sth to yourself表示把…放在心里的意思，多用于保守心事/秘密之类场合，本句是please祈使句，用动词原形，故答案是keep…to．