A. invent    
B. invention    
C. inventor

1. This tree can grow up t0 5 meters in____(long).
2. He had the____(responsible) for the whole accident.
3. I heard them____(quarrel) when I passed their house.
4. They make people understand the importance of____(educate).
5. I am ____ (pride) of you.

1. The   ____ (true) is even scientists can't agree on why we need to sleep,
2. We   ____ (real) need to get a good night's sleep.
3. Sleep ______ (expert) say it's better not to try too hard to get to sleep.
4. You might have problems with your memory or with your______ (concentrate).
5. Jim Steed has a simpler way of______ (look) at it.

A. noise          
B. noisy        
C. noisily

A. importance,  most important
B. important,  importance
C. importance,  the most important

1. Nancy wants _____ (be) a _____ (wait).
2. What _____ your uncle _____ (do)?
3. There are two _____ (policeman) at the crossing.
4. He is a doctor. He _____ (work) in a hospital.
5. — Where _____ he _____ (come) from?
    — No, he _____ (come) from Canada.

[     ]

A. water
B. house
C. drink
D. food

A. scarf                     
B. wallet        
C. notebook               
D. sunglasses

A. a comedy    
B. a documentary      
C. a thriller      
D. an action movie