1、我们以一个题目引入今天的课程。_______ reading this book took much time, I think it's worth it.A. AlthoughB. AfterC. If onlyD. In case
3、让步状语从句有哪些引导词？n1. though/although两者有什么区别？Although更为正式。
5、n2.even though和even if这两者与其更为强烈区别：Even though 一般后面放事实情况Even if 后面一般是假设情况
