I. Use active or passive, in any appropriate tense, for the verbs in parentheses.

1. The Amazon valley is extremely important to the ecology of earth. Forty percent of the world’s oxygen (produce) ___is produced______ there.

2. The game (win, probably) _______will probably won___________ by the other team tomorrow. They’re a lot better than we are.

3. There was a terrible accident on a busy downtown street yesterday. Dozens of people (see) _ saw___ it, including my friend, who (interview) _was interviewed____ by the police.

4. In my country, certain prices (control) ______is Controlled___________ by the government, such as the prices of medical supplies. However, other prices (determine) _ is determined__________________ by how much people are willing to pay for a product.

5. Yesterday the wind (blow) ______blew_____________ my hat off my head. I had to chase it down the street. I (want, not) __won’t_______ to lose it because it’s my favorite hat and it (cost) ____cost___ a lot.

6. Right now Alex is in hospital. He (treat) _____is treated____________ for a bad burn on his hand and arm,.

7. Yesterday a purse-snatcher (catch) __was caught_____ by a dog. While the thief (chase) _was being chased ____ by the police, he (jump) ____jumped____ over the fence into someone’s yard, where he encountered a ferocious dog. The dog (keep) ____kept_____ the thief from escaping.

8. Frostbite may occur when the skin (expose) _ is exposed______ to extreme cold. It most frequently (affect) _______affecting____ the skin of the cheeks, chin, ears, fingers, nose, and toes.

9. The first fish (appear) ____________was appeared_________ on the earth about 500 million years ago. Up to now, 20,000 kinds of fish (name) ________named_______________ and (describe) ___described________________ by the scientists.

10. A network of lines (discover) _____discovered_____ on Mars’ surface by an Italian astronomer around the turn of the century. The astronomer (call) ___called_____________ these lines ―channels‖, but when the Italian word (translate) ____translated________________ into English, it became ―canals‖. As a result, some people thought the lines were waterways that (build) _was built________ by some unknown creatures. We now know that the lines are not canals. Canals (exist, not) __not existed___________________ on Mars.

Dikerjakan oleh :

1.Irfan rakhman hidayat (1206273781)

2.dewi aprianingsih (120625214)

3.Nana