sat (because of pleading in vain for improved maintenance service_英语解答

sat
(because of pleading in vain for improved maintenance services,the tenants refused)to pay rent until the landlord agreed to make the much more-needed repairs.
答案是having pleaded in vain for improved maintenance services,the tenants refused
because of为什么不行呢?because of和 having done在这句话里的区别是什么?

人气：408 ℃　时间：2020-04-11 14:20:54

解答

Because of doing sth 看着真别扭……所以肯定不对
以上解释看似霸道,事实也的确如此.SAT IS题就是注重最佳答案,语法正确不代表是正确答案.一般情况下符合awkward expression的都不是正确答案（除非其他选项都有语法错误）
Because出现在正确答案中的,大多数是because of + n.(不是动名词)或Because + 句子
Having done用在这里虽然没有出现表示因果关系的连词,但前后发生就已经隐含一种因果关系了