Exercise 6: Read the following passage and circle the letter A, B, C, or D to indicate the correct word or phrase that best fits each of the numbered blanks.

The temperature on Mars is very cold, so all the water on (1) _________ surface is iceman scientists think that there is water in the soil or even in underground rivers. There may be life on Mars, too. At the moment, robots (2) _________ the Earth are exploring Mars and looking for life.

Europa is one of Jupiter's moons and it's covered in ice. Although the surface is very cold, scientists think it's warmer inside. There may be oceans under the ice and bacteria or other (3) _________ things in the oceans. One-day people will send robots to explore this planet to look for life.

Titan is the largest moon in Saturn. It is the only moon in the solar (4) _________ with atmosphere. It has rivers, lakes, rain and clouds. These are made of chemicals called hydrocarbons, and scientists think that there is water under the surface of Titan, too. Living things are made of hydrocarbons and water. One day we will (5) _________ life on Titan.

(Adapted from Oxford Read & Discover)

1. A. it B. its C. their D. the

2. A. in B. on C. from D. to

3. A. living B. alive C. lively D. live

4. A. body B. organisation C. space D. system

5. A. save B. discover C. learn D. explain

TEST 4 (UNIT 10-UNIT 12)

Exercise 2. Choose the best answers.

1. Alexander Graham Bell was the _______________ of the telephone.

A. developer B. inventor C. writer D. write

2. Sir Alexander Fleming was the _______________ of penicillin.

A. creator B. explore C. founder D. cooker

3. He works as a software _______________, writing programmes for IBM.

A. explorer B. engineer C. developer D. Artist

4. As a/an _______________, he works on reactions in laboratories.

A. chemist B. engineer C. archeologist D. teacher

5. The environmental _______________ met to discuss ways to deal with sea pollution.

A. doctors B. conservationists C. developers D. nurses

6. In 1876, the telephone ____________ first introduced by Bell and Watson.

A. was B. is C. has been D. had been

7. It’s important ____________ wildlife in the area.

A. to conserve B. conserving C. conservation D. conserve

8. Japan 40% of its waste every year.

A. reuses B. recycles C. refill D. broken

9. We were delighted ____________ your letter yesterday.

A. to get B. got C. getting D. get

10. Sooner or later a satellite ____________ by a large piece of rubbish.

A. will destroy B. will destroyed C. will be destroyed D. will been destroyed

11. Let’s play tennis instead of ____________ television.

A. watch B. watching C. watches D. to watch

12. Everything depends on what you mean ____________ the word “free”.

A about B. for C. of D. by

13. We should use ____________ bags instead of plastic bags.

A. cloth B. clothe C. clothed D. clothing

14. Beer ____________ for breakfast in England years ago.

A. used be drunk B. used to be drunk C. used to drunk D. used to be drank

15. I ____________ some rice on the floor of the chicken coop.

A. raised B. grew C. threw away D. scattered

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