A. with great importance
B. importance
C. no important
D. of great importance

A. air
B. water
C. light
D. noise

A. What; toothpaste
B. Whom; toothpaste
C. How; toothpaste
D. Where; toothpaste

A. success
B. confidence
C. progress
D. knowledge

1. I don't believe she told us the_________. (true)
2. My deskmate looked _________, for he failed in the English test. (happy)
3. The old lady looked _________ at me. (angry)
4. Our government is doing something useful to solve the________ problems. (environment)
5. It's really ________ for a child of five to take care of himself. (possible)
6. The old man likes to live in a ________ place. Now he is sitting there ________. (quiet)
7. He is a _________ scientist. He comes from _________. (German)
8. The girl is the most _________ member in the school singing group. (act)
9. I am not used to the weather here. It is               . (change)
10. ________, I have just got enough money to buy the new CDs. (lucky)
11. Staying up at night is ________ to our health. (harm)
12. They will decide on ________ (suit) ways to help those ________ (home) people.