精选优质文档-倾情为你奉上高中重点语法主语从句提升练习及答案主语从句作为考察点是比较简单的，但是大家也需要通过语法主语从句提升练习来巩固知识点，希望做过练习后大家可以完全掌握主语从句。单项选择题1. _ as much as one-fifth of all timber harvested is not used. A. The estimate B. The estimate C. They are estimated D. It is estimated that2. _ was once regarded as impossible has now become a reality. A. That B. Which C. Who D. What3. _ we have achieved is attributed to the guidance of our parents. A. Whoever B. Whatever
