They, the former opponents, were sitting talking side by side. I thought my eyes were playing tricks ______ me.

【参考答案】

on题意为：他们以前是对手，现在并肩坐在一起交谈，我都不敢相信自己的眼睛。play tricks on sb.“欺骗某人......

(↓↓↓ 点击下方‘点击查看答案’看完整答案 ↓↓↓)