Complete the dialogues using the phrases for asking and giving permission.

a. - … I have my practice at the British Steel Works?

- …

b. - … I observe the steel making process?

- …

c. - … we study the properties of various types of steels today?

- … Later we’ll discuss … .

d. - …I use these substances for the experiment?

- …

e. - … I continue the research?

- …

f. - … we studied the influence of temperature on the strength of plastics?

- …

Find words formed from the first word in the line.

1. corrode – code, corrosive, charge, conductor

2. cast – substance, content, casting, steel

3. require – environment, requirement, refine, tempering

4. pure – sulphur, powerful, impurity, perform

5. metal – modern, meat, malleable, non-metal

6. considerable – carbon, constituent, construction, considerably

7. complete – competition, completely, tremendous, economical

8. charge – change, research, discharge, consumer

9. exhaust – explanation, expensive, efficiency, inexhaustible

Restore the original sentences.

1. was/ allowed/ the/ research/ he/ continue/ to

2. carbon/ engineer/ content/ the/ of/ increase/ steel/ the/ may/ the

3. may/ these/ for/ you/ substances/ experiment/ use/ the

4. cannot/ this/ describe/ experiment/ I/ results/ the/ of/ today

5. be/ copper/ alloyed/ can/ iron/with.

6. engineers/ copper/ use/ can/conductors/ electrical/ for/ the

7. cannot/ this/ difference/ and/ brass/ student/ explain/ the/ between/ bronze

8. test/ substance/ in/ scientists/ the/ can/ use/ samples/ the/ this/ of/ the

9. must/ Alex/ a/ write/ report/ the/ of/ detailed/ test

10. compare/ two/ of/ they/ tests/ must/ results/ the

Say what these people could do in the past.

For example: I cannot use the new apparatus now but I could use it yesterday.

1. He cannot do research on copper alloys this term but he … it last term.

2. We cannot compare the properties of these substances now but we … them during our previous experiment.

3. They cannot study aluminium bronze at the lesson now but they … it in the lab yesterday.

4. We cannot extract copper with the help of stone and bone but ancient people … it in this way thousands of years ago.

5. I cannot describe the results of his experiment today but I … them yesterday.

Give advice to your friend in the following situations. Use the modal verb should.

For example: Student A: I have an examination tomorrow.

Student B: Well, you should work very hard tonight.

1. I don’t know how to draw up a report of my experiment.

2. I’m very tired after the practical class.

3. I’d like to know more about plastics.

4. I’d like to buy good sports equipment.

5. I want to become a materials engineer but I don’t know what I must study and at what University.

<== попередня сторінка	\|	наступна сторінка ==>
Extract B	\|	Use the following statements in the past and future.

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