几个高中语法题,求详解.

选A to deal 。complex problems to deal是“有待解决的问题”的意思。The traditional approach with complex problemsto deal is to break them down into smaller。解决复杂问题的一般方法是将问题分解为若干个小问题。选B however much it costs。这是条件状语从句,（无论它的价格是多少。） D选项要改为no matter how much it costs 也是这个意思。