Day 1

1.He wrote a letter ____________ he explained what had happened in the accident. 

2.Sales director is a position __________ communication ability is just as important as sales skills.

3.After living in Australia for many years,Louise returned to the country ________ she was born.

4.There are many good websites _________you can check out the latest in the scienceworld.

5. His interest started a few years ago, __________he was in college and studyingwildlife science.

6.Finally, after four hours,they arrived at the campsite (营地) _________their parentswere waiting.

Day 2

1.The boss of the company is trying to create an easy atmosphere ________his employees enjoy their work.

2. I still remember the day ___________ the accident happened.

3. He refused to tell me the reason he was late.

4. The days are gone __________________women were looked down upon.

5. Students should involve themselves in community activities ___________they can gain experience for growth.

6. Finally he reached a lonely island _________was completely cut off from the outside world.

7. I will never forget the day____________ I left my hometown.

8. Can you make a sentence ________________this verb can be used.

9. The reason ____________I'm in favor of this idea is that it is practical.

10. The general at last got a chance to visit the village __________he used to fightwith the enemies.

Day 3

1. This is the hotel ____________they stayed last month.

2.Do you know the year ____________the Chinese Communist Party was founded?3. Great changes have taken place since then in the factory _________we are working.

4. May the fourth is the day _________we will have a day off.

5. The hotel ___________we stayed during our holidays stands by the seaside.

6. This is the reason ___________he didn't come to the meeting.

7. The reason he didn't come was that he was ill.

8. I shall never forget those years __________I lived on the farm with the farmers.

9. The village ___________we live is surrounded by forests.

10. He was born in the year ___________the Anti-Japanese War broke out.

Day 4 请将下列的几组简单句合并成定语从句：

1. This is the school. My mother works in the school.

2. I still remember that day. You left for Beijing on that day.

3. Could you explain the reason? You were late for the reason.

4. I have forgotten the exact date. This country became independent on the exact day.

5. He gets into a situation. It is hard to decide what is right or wrong in the situation.