PRACTICE

Date: 2015-10-07; view: 445.

Exercise 1: Combine each of the following pairs of sentences into one sentence using an appropriate relative adverb and the word given.

1. Our universe and human beings are studied in an area. The area is science.

Science……………………………………………………………………………

2. It was the year 1704. In this year, Newton had his second famous works named Opticks published.

1704 was the year.………………………………………………………………..

3. You do experiments in a room. We call that room a libratory.

The room …………………………………………………………………………

4. It was the year 1792. France set up a new system of measurements in this year.

The year 1792 ……………………………………………………………………

5. It is the International Bureau of Weights and Measurements near Paris. The standard meter is kept there.

The International Bureau …………………………………………………………

…………………………………………………………………………………....

6. Seven basic units were first defined in 1971. In this year, the 14th International Conference on Weights and Measures was held.

The year 1971…………………………………………………………………..…

………………………………………………………………………………….…

7. It was the year 1959. In this year, a yard was officially defined as being 0.9144 meter.

The year 1959 was the year ………………………………………………………

8. It was in the year 1960. A new standard meter was found out, basing on light wavelength.

1960 was the year…………………………………………………………………

9. 1983 was an important year. In this year, standard meter was officially defined as the distance that light wave can travel in a given time.

1983 was …………………………………………………………………………

…………………………………………………………………………………....

10. The English and metric systems of measurements are both in used in one country.

That country is the U.S.

The U.S. is …………………………………………………………………….....

11. People prefer to use the metric system. It is because this system is simpler and more convenient to use.

The reason……………………………………………………………………...…

…………………………………………………………………………………....

12. Both English and metric systems of measurements can be used at the same time.

There are many situations for this application.

There are …………………………………………………………………………

…………………………………………………………………………………....

13. He failed to give correct answer to the question. It is because he did not know how to convert the unit of length in English system of measurements.

The reason ……………………………………………………………………..…

…………………………………………………………………………………....

14. Physics is an important field. Most of the universal and human issues are discussed in this field.

Physics is……………………………………………………………………….…

…………………………………………………………………………………....

15. Each week students have to go to the workshop. They do a lot of practice there.

Weekly, ……………………………………………………………………….….

Exercise 2: Give the appropriate form of the verb (either in present or past participle) to complete each of the following sentences.

1. The (choose) ……………. seven units in 1971 are defined as basics units.

2. The (measure)……………… jar is used when we want to measure the volume of irregular objects.

3. The (travel) ………………. path of any object can be measured.

4. The conversion of English system of measurements confuses me. I am thoroughly

(confuse)…………………

5. No one may attend the lecture except the (invite) …………….. guests.

6. The (exist)………………… matter that makes scientists wonder is how to maintain natural resources.

7. Physics is a very (stimulate) ……………….. subject because once you get your hands down to it, you start to think hard of our universe and ourselves.

8. The (freeze) ……………….water has lower density than liquid water.

9. Outstanding students always have (inquire)……………….. minds.

10. The (contaminate) ………………….. air has great influence on the success of the observations.