我感觉到他在隐瞒关于那起事件的信息。

I sensed he was ___keeping information ___back about the incident.

尽管受到严厉盘问，这位证人拒绝隐瞒任何关键细节。

Despite intense questioning, the witness refused to ___keep any crucial details ___back.

这位政治家被指控向公众调查隐瞒了关键证据。

The politician was accused of ___keeping vital evidence ___back from the public inquiry.