他在一些不重要的事情上花费时间太多，这导致了整个计划的失败．（which）．

Question

他在一些不重要的事情上花费时间太多，这导致了整个计划的失败．（which）___．

Answer 1

答案：He spent too much time on some unimportant/less important things，which led to the failure of the whole plan．或He wasted too much time dealing with some unimportant/less important things，which resulted in the failure of the whole plan．
在某事上花太多时间spend too much time on；导致lead to或result in；失败failure；句意表达的是过去的事实，要用一般过去时态．