Exercise 19. Grammar test

Exercise 18. Discuss the following questions.

Exercise 17. Choose the correct answer according to the text.

1. One fifth of copper usage belongs to …

a. preparing alloys.

b. plumbing and roofing.

c. machines productions.

d. electrical wires.

2. Copper alloys are used to …

a. decrease prices on machinery production.

b. produce different sculptures.

c. supply agriculture.

d. harden machinery parts.

3. Aluminium …

a. has a better heat dissipation capacity than copper.

b. is widely used as copper substitute.

c. has the same electrical properties as copper.

d. is inferior to copper in thermal capacity.

4. The great conductivity of copper allows the material to…

a. meet efficiency standards.

b. decrease motor efficiency.

c. consume almost a half of all global electricity.

d. Compete NEMA.

5. Which sentence is not true?

a. Copper alloys have a green colour.

b. Copper is used in roofing because of a low corrosion resistance.

c. Copper rods conduct electricity through the ground.

d. When welded copper is good to braze.

1. Can you explain in simple terms what the difference in fiber optics and traditional copper cables?

2. And do signals really travel faster in fiber optics?

3. What are the advantages of fiber optics?

4. Can you give me a definition of structured cabling?

5. What are some of the uses of fiber optic cabling in the business world?

6. How do you classify fiber optic cable?

7. What type of fiber is required to run at gigabit speed?

1. I don’t mind … alone.

a. to work

b. to working

c. working

d. work

2. Me jeans need ….

a. wash

b. washing

c. to wash

d. washed

3. I wasn’t allowed … out unless my parents knew where I was going.

a. going

b. to

c. go

d. to going

4. We enjoy … for picnics.

a. to going

b. to go

c. go

d. going

5. Don’t forget … me before you leave.

a. wake

b. waking

c. to wake

d. to waking

6. You are not allowed … here

a. smoking

b. to smoke

c. smoke

d. to smoking

7. I hate … for exams.

a. to be preparing

b. preparing

c. prepare

d. to have prepared

8. They went on … though it was late.

a. to work

b. to have worked

c. working

d. to working

9. I was made ….

a. to leave

b. leaving

c. leave

d. to leaving

10. Taking the job will mean … to Detroit.

a. to move

b. move

c. moving

d. to moving

11. Jack always stopped … the oil level in the engine.

a. to have checked

b. checking

c. to checking

d. to check

12. If you don’t make him … his homework, I will!

a. to do

b. do

c. doing

d. to do

13. Jill felt something … her on the shoulder.

a. to touch

b. touches

c. to touching

d. touch

14. Jennie had never heard him … before.

a. to complain

b. complained

c. to complaining

d. complain

15. I want him … to the party.

a. invite

b. be invited

c. inviting

d. to be invited

16. You can’t expect anyone … it at once.

a. to do

b. doing

c. having done

d. to doing

17. They suggested … back to Mike’s house.

a. to go

b. go

c. to going

d. going

18. This summer we look forward … prices for gasoline.

a. to decrease

b. decrease

c. decreasing

d. to decreasing

19. Mary didn’t succeed in … things easily.

a. taking

b. taken

c. having taken

d. being taken

20. I … nights and I like it.

a. used to working

b. got used to work

c. didn’t use to work

d. am used to working

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