语法大复习(一) 定语从句和名词性从句1. Some children want to challenge themselves by learning a language different from _ their parents speak at home. A. it B. that C. what D. which2. _remains to be seen _ the newly formed committees policy can be put into practice. A. It; that B. What; which C. What; what D. It; whether3. That tree, _ branches are almost bare, is a very old one. A. that B. which C. who