用所给词的适当形式填空： 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.