father asked me to keep the secret_____myselfA.for B.with C.at D.to

father asked me to keep the secret_____myselfA.for B.with C.at D.to
father asked me to keep the secret_____myself
A.for B.with C.at D.to

father asked me to keep the secret_____myselfA.for B.with C.at D.to
D
I even give many details of the Bad Number strategy in my Silver lotto System manual,but just like Coca-Cola - I keep the secret ingredient to myself!
If telling him would affect our love,I would rather keep the secret to myself and die with a bruised conscience.
也可以搭配within,by
I'll just keep the secret within myself & her.
So I told my parents I was as healthy as I could be and keep the secret by myself.

D to

选A

A

keep to 保密

D

B

D
keep the secret是保密的意思 用to的话是不是可以这样理解:保持这个秘密只有我知道

Should be KEEP TO
So (D)