Ⅰ.将下列句子改成“介词＋关系代词”型定语从句(每空一词)
1．In our class all the fifty students took part in the final exam. Only one of them didn't pass the exam.
→In our class all the fifty students, only one ________ ________ didn't pass the exam，took part in the final exam.
2．The day will come. Ordinary people can travel by spaceship on the day.
→The day ________ ________ ordinary people can travel by spaceship will come.
3．He worked in a factory. A middle school was attached to the factory.
→He worked in a factory ________ ________ a middle school was attached.
4．The famous scientist once lived and worked in the village. Does this road lead to the village?
→Does this road lead to the village ________ ________ the famous scientist once lived and worked?
5．The postman comes at 6：30 in the morning. I am usually fast asleep at that time.
→The postman comes at 6：30 in the morning, ________ ________ ________ I am usually fast asleep.
6．The famous scientist made a great contribution to our country. I'm going to write a book in memory of him.
→The famous scientist, ________ ________ ________ ________ I'm going to write a book, made a great contribution to our country.
7．Let's remember the day. The heroes died for our country on that day.
→Let's remember the day ________ ________ the heroes died for our country.
8．Mr Li will go abroad to study for a year. We have made great progress in maths with the help of him.
→Mr Li, ________ ________ ________ ________ ________ we have made great progress in maths, will go abroad to study for a year.
9．That's a practical problem. I will still need to find a solution to it.
→That's a practical problem ________ ________ I will still need to find a solution.
10．The river has been seriously polluted. There used to be many beautiful flowers on its banks.
→The river ________ ________ ________ there used to be many beautiful flowers has been seriously polluted.
