暂时对此保密可能是明智的。

It might be wise to ___keep this ___quiet for a while.

他们试图保密，但不知何故，半个村子在几天内就知道了这个消息。

They tried to ___keep it ___quiet but, somehow, half the village knew about the news in a few days.

公司决定在官方宣布之前对合并保密。

The company decided to ___keep the merger ___quiet until the official announcement.