Ex. 2. Write the sentences, choosing one of the modals. 1. We are leaving tonight, so you (should/must) buy a ticket for the flight.
2. (May/Might) I come in?
3. David (can/could) cook well when he wants to.
4. 'Do you think it (can/might) rain?' 'Yes, possibly. We don't want to get wet so I think we (should/must) take our raincoats.'
5. Jenny tried to carry him but she (can't/couldn't).
6. We (can/might) visit my cousin in Australia next year but we don't know yet.
7. In many countries, you (should/must) wear a seat belt in the car - it's the law.
8. (Can/May) you hold this for me, please?
9. I know they enjoy their work but they (shouldn't/'mustn't) work at the weekends. It's not good for them. I think they (should/must) spend time at home with their families.
10. The letter (can/may) arrive tomorrow.

1. Canals provide water for crop farming.  
2. There is a tendency for growth of the trade between the two countries.  
3. Trade is an important branch of the economy as it helps industry and agriculture to provide goods for consumers.  
4. Consumers are people for whom all industries produce goods and services.
 5. They process minerals by means of chemical reactions.
 6. Mining belongs to the primary and to the secondary sectors.  
7. The primary sector includes mining, agriculture, hunting, fishing and beekeeping.  
8. Countries that are rich in land produce agricultural products.  
9. Crop farming and animal farming are branches of agriculture

Laura: Oh, I love our new house! What a big living room!
Steve: It's really great! Now, let's put the furniture in place. Can you give me a hand, John?
John: Sure. Dad. Let's start.
Steve: Where do you want the sofa, Laura?
Laura: Put it in front of the window.
Steve: All right... What about this armchair?
John: Quick, Dad, it's really heavy!
Laura: Can you put it next to the fireplace?
John: Agh! Dad, watch out! Is it OK, right here?
Laura: No, not there! It looks better on the other side, between the fireplace and the door. That's great!
Steve: Right... Where shall we put this clock?
Laura: Oh, put it on the wall, opposite the sofa. Be careful! It's very expensive!
John: Phew ... Mum, calm down! We're doing our best, OK?
_aura: OK, I'm sorry. Hmm ... What else ...? What about this table? Let's place it between the sofa and the armchair.
Steve: Err... What about the carpet, Laura?
_aura: Oh dear! I want that to go under all the furniture!