I: Use the correct from of the word given to complete each sentences.
1. The earthquake has caused great_____________, and rebuilding the city will take years. (destroy)
2.____________ saucers might be aircraft, balloos, clouds or tricks of light. (fly)
3. UFO is no longer human's_________________(imagine)
4.___________is a film or radio or television program giving facts about something. (document)
II: Rewrite the following sentences without changing their meanings.
1. The police let him leave after they had questioned him.
-> He was ________________________________________
2. I haven't seen that man here before.
->It's_____________________________________________
3. The furniture was so expensive that I didn't buy it.
->The furniture was too______________________________
4. I'm always nervous when I travel by air.
->Traveling_______________________________________