Unit 4 Section Ⅱ
Ⅰ.语法填空
1．__That__ the universe began with the “big bang” has been widely accepted.
解析：句意：宇宙开始于“大爆炸”已被广泛接受。从句中意义完整，只需要引导词。
2．It has been proved __that__ having a balanced diet helps to keep healthy.
解析：句意：据证明拥有一个均衡的饮食有助于保持健康。it为形式主语，后面从句为真正的主语，且从句意义完整。
3．__It__ is a fact that English is being accepted as an international language.
解析：句意：英语正被接受成为国际性语言是一个事实。此处用it作形式主语，that从句为真正的主语。
