分类：教育/科学-升学入学-高考
问题：选择题Ithadbeenrainingforfivedayswh 
It had been raining for five days when we arriv in Mexico, ____ the roads were very muddy.A. now that    B. as though   C. so that     D. because这题为什么选 D?
回答：now that有since的意思，中文中勉强可以解释为既然
as though类似as if，好像，类似，视情况后面可能会带虚拟语气
so that表目的，A so that B，A导致B

这句话是通过road推测weather，表推测，一般来说用for会比较贴切，但是没有for，只能用because凑合了

题目出得不好