keep ·phrase

布朗先生显然推迟了宣布，并设法对整个团体保守秘密。

Mr. Brown apparently delayed the announcement, and managed to ___keep it ___secret from the entire group.

我从六年级就喜欢肖恩，但我一直保守这个秘密。

I had loved Sean since sixth grade but I was ___keeping it ___a ___secret.

我们必须直到发布前都保守我们的计划秘密。

We must ___keep our plans ___a ___secret until the launch.