secret should be kept...是什么意思?

secret should be kept...是什么意思? _____ came that his ______should be kept secret. should be kept informed 为什么不是kept informing? People should ____cutting trees A be kept to cut B be kept f All the medicine should be kept out of ___________of childre time goes by,good friends should be kept forever. scientists should be kept in formed of the latest developmen They should be kept informed of the situation there It must be kept in mind that there is no secret of success b 翻译:it must be kept in mind that there is no secret of succes SHOULD BE CANCELED是什么意思 Secret is secret是什么意思