[译] 魔鬼答应要是有人把他从罐子里救出来，他会让这个人非常富有。
[误] The Genie made a promise which he would make him rich if anyone set him free from the jar.

[正] The Genie made a promise that he would make him rich if anyone set him free from the jar.
[注] make a promise 是"答应，许诺"，这里 promise 是名词。通常在 promise 后有一个同位语从句，说明"答应"的具体内容。同位语从句的引导词用 that, 不用 which。