他出人意料的回答让在场的所有人都感到困惑。

His unexpected answer ___confounds everyone in the room.

这两对双胞胎长得太像了，经常让人分不清谁是谁。

The two pairs of twins look so alike that they often ___confuse people.

新证据推翻了目击者的证词。

The new evidence ___confounds the witness's testimony.