To have the wool pulled over one's eyes  蒙蔽某人

例句: Poor Mr. Brown--his partner certainly pulled the wool over his eyes. He had no idea the partner was stealing all the profits until the man suddenly left town. 可怜的黄先生，和他合伙的人肯定欺骗了他。黄先生一直不知道那人在偷偷地把赚来的钱放到自己口袋里去，直到那人突然一走不返，这才使他恍然大悟。
例句: I won't vote for that politician again. I've seen him pull the wool over the eyes of the voters with lots of promises, but he never carries them out once he gets into office. 这句话翻到中文就是说：“我不会再投那个政客的票了。我已经看到他向选民们许好多愿来蒙蔽他们。但是，一旦当选，他所作的保证一个也没有兑现过。”