Fill in the gaps with the proper item.

1. She ____ understand Korean very well, but she ____ speak it perfectly.

a) be able to / cannot

b) is able to / is able to

c) is able to / cannot

2. When Olha was young, she ____ type quickly. She took a typing class and now she ____ type very quickly!

a) can / could

b) could not / can

c) could not / can to

3. ____ you play the piano when you were a child?

a) May

b) Could

c) Can

4. Nina ____ Italian food and she ____ French food too!

a) can cooking / can cooking

b) can cook / is able to cook

c) can cooks / can cooks

5. Peter ____ swim when he was a child, but now he ___. In fact, he swims every day!

a) could / can't

b) couldn't / can't

c) couldn't / can

6. We _____ get to the meeting on time yesterday, because the train was delayed by one hour.

a) couldn’t

b) can’t

7. I _____ drive a car until I was 34. Then I moved to the countryside, so I had to learn.

a) couldn’t

b) wasn’t able to

17. Fill in the gaps with can, can’t, could, couldn’t or was / wasn’t able to.

1. Like all simple machines, a lever ….. either give you more force or more distance, but as you get more of one you always give up some of the other.

2. Early men and women knew that a weight …... be pushed up a hill or a ramp of earth with less effort than would be required to move the same weight vertically.

3. A lever helps you do more work than you ….. do by yourself.

4. Wedges ….. be used for splitting open or pushing apart.

5. I had my hands full, so I ….. open the door.

6. When I was young, I ….. stand on my head.

7. Although he felt ill, he ….. finish all the paperwork.

UNIT 10

COMPLEX MACHINES

LEAD-IN

1. Look at the picture and say, what simple machines does a bike consist of?

2. In pairs, discuss what is meant by “complex machines”. Give examples of such machines.