[译] 我们采纳了他们提出的房屋要修理的建议。
[误] We adopted their proposal which the house should be repaired.

[正] We adopted their proposal that the house should be repaired.
[注] 根据 proposal 的用法特点,它后面跟的不是定语从句,而是同位语从句。which不能引导同位语从句,所以误句中的 which 应改成 that。