keep it secret the information that i know

keep it secret the information that i know
keep it secret the information that i know

keep it secret the information that i know
不能这样用it已经是代词了,就不能再加上information
keep the information i know secret
或者
keep what i know secret

keep the infor. i know secret
语法上通 但是表达不对 information that i know这个表达方式很vague

keep sth +adj 表示使某物处于某种状态
the information that I know 是某物 只不过里面有后置定语

为避免产生歧义，我感觉还是改成Keep the information secret that I know.比较好一些。