A. to stress
B. stressing
C. stress
D. stressed

A. three hundreds years
B. three-hundred-year-old
C. three-hundreds-years
D. three-hundred-years old

A. interesting; interested
B. interested; interesting
C. interested; interested
D. interesting; interesting

1. The Blacks would like to stay in an          (expensive) hotel to save money.
2. They are going to an         (excite) place.
3.I don't think it's a good idea to travel there. It's too         (tour) there.
4. During the vacation, they        (trek) for five days along the banks of the
Mississippi.
5. This is a____(peace) summer vacation.

1. Dave has worked for 6 hours, so now he is very s           .
2. The o     day, he bought a present for me.
3. They aren't s         enough at that age.
4. He often s___   up reading until midnight.
5. Do you like your school u____?

A. so; that                    
B. too; to      
C. enough; to                 
D. such; that

A. flesh                      
B. fresh
C. flash                      
D. folk

A. strong                      
B. power
C. magic                      
D. new

A. the certain                  
B. a certain        
C. certain                      
D. some

1. Elephants are the most e   animals in the world, I think.
2. It's important to r    paper to save the trees.
3. The a____ animals should be put in cages.
4. Most people are a____ putting animals in the zoo.
5. That big zoo is s____ for animals to live in．