1 . This is the reason ________ I built a special device. (用适当的词填空)

2 . The reason ________ we could succeed was that we could work efficiently as a team. （用适当的词填空）

3 . John has been unwell, and this may be the reason ________ he lost the match. (用适当的词填空)

4 . Is this the reason ________ he was late for the meeting of last week? (用适当的词填空)

5 . What I want to know is the reason _____ stone walls are used instead of fences around New England fields. (用适当的词填空)

6 . None of us know the reason ________ Tom was absent from the meeting.

7 . Do you know the reason ___________ John is so angry?

8 . Directions: Define the following items using whose, preposition+ which/whom, or when, where, and why.
1. A genius is a person_______________________________.
2. An opera house is a theatre_______________________________.
3. A platform is a raised area_______________________________.
4. An anniversary is an important date_______________________________.
5. A ceremony is a public occasion_______________________________.
6. A positive life attitude is a reason_______________________________.
7. Gardening is a leisure pursuit_______________________________.
8. A trunk is the main part of a tree_______________________________.

9 . Directions: Complete each of the following sentences, using a relative pronoun, a relative adverb or preposition +which/whom
1. Many of Hollywood action movies show scenes __________the actors chase each other in cars, or in airplanes or on foot.
2. These holidays have their roots in miracles__________ took place thousands of years ago.
3. Our immediate goal should be to maximize the extent __________our most precious natural resource is conserved and protected.
4. That same night, the two seriously burnt boys were moved to a -children's hospital__________ doctors again worked round the clock to make sure their condition remained stable.
5. Do you know the date __________we have to hand in the essay?
6. I didn't get a pay rise, but this wasn't the reason __________I left.
7. The rate __________a material heats up depends on its chemical composition.
8. Many of her friends, __________I like to be considered, gave her encouragement.
9. The valley __________the town lies is heavily polluted.
10. Later in this chapter we will introduce cases __________consumer complaints have resulted in changes in the law.