他们让我们对他们的计划一无所知。

They kept us ___in ___the ___dark about their plans.

彼得总是让她对他们争吵的原因一无所知。

Peter had always kept her ___in ___the ___dark about the reason for their fight.

管理层让员工对即将到来的裁员一无所知。

The management left the employees ___in ___the ___dark about the upcoming layoffs.