3．After working hard bit by bit for a long time.Tu Youyou won the Nobel Prize in her seventies．(——青夏教育精英家教网——

3．After working hard bit by bit for a long time，Tu Youyou won the Nobel Prize in her seventies．（　　）

2．Sandy， for some information about the topic．Then share it with us，please．（　　）

1．-The experiment seems difficult．Would you mind doing it for me？
-Why not do it by yourself？I show you how to do it if necessary．（　　）

20．When I walked the south side of the square，I happened to meet our English teacher．（　　）

19．Mr．Brown passed his company to his daughter and she is it at present．（　　）

18．-Hiking and swimming are good ways to relax．
- are OK，I think，but I like jogging best．（　　）

17．It is known to all that the day becomes shorter and shorter winter comes．（　　）

16．The desk is in a mess．Would you please your books？（　　）

15．Dr．Ma has helped a lot of patients see again in the of his life．（　　）

14．Jack is eight-year-old boy and he goes to school on foot every day．（　　）

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