1 . 不顾他们缺乏烹饪经验的事实，双胞胎仍然满怀期待地为妈妈准备一顿特别的早餐。
__________________, the twins still prepared an exceptional breakfast for their mother with great expectations.

2 . 毫无疑问你会遇到许多挑战，但是我毫不怀疑你有能力独自完成我们的项目。
________________you will meet with many challenges, but ________________ you have the ability to complete our project alone.

3 . 科学家和研究人员积极投入到对它们的调查研究中，试图解开金字塔是如何建成的这一世界之谜。（同位语从句）
Scientists and researchers ________________ and study of them, trying to solve the mystery ________________.

4 . The fact ______ she never knew the secret surprised me.
她从来不知道这个秘密，这让我很惊讶。

5 . The story goes as follows. The wind and the sun were disputing who was the stronger. (用同位语从句合并)

6 . 人们过去相信地球是宇宙的中心。

People used to hold the belief ______.