1 . 我发现所有学生的注意力都集中在那张图片上了，没人在听我讲课。这让我很恼火。

I found all my students’ attention ________ on the picture and no one paid any attention to me, ________ upset me greatly.

2 . Fortunately, my neighbor helped me out. His teacher was a doctor. （用定语从句合并句子）
→Fortunately, my neighbor, ________________, helped me out.

3 . I have so many friends. Two thirds of my friends are girls. (改写定语从句)
I have so many friends, ____________________________________.

4 . I have a lot of friends. Most of them are considerate and hard-working. (用定语从句合并句子)

5 . Reading is very important, ________when we were very young. (定语从句)
阅读非常重要，这一点我们在小时候就已经知道了。

6 . As a visitor or guest in either a Chinese home or restaurant, you will find that manners are important, ________and keep you in high spirits. （根据课文内容填空）

7 . They left almost everything in the house to us. Among them were two bookshelves packed with thick books. (用“介词+关系代词”限制性定语从句升级)

8 . 众所周知，袁隆平为世界做出了很大贡献。.
________ ________ ________ to all, Yuan Longping made great contributions to the world.

9 . Camping popularity increases among young people. Most of them are nature lovers. (用非限制性定语从句合并)

10 . Science fiction is regarded by many people as a mirror. Our future can be freely imagined and explored through science fiction.(用定语从句合并句子)