2

1. El llama por telefono todos los dias
2. Rosa tiene tres hijos
3. Ignacio habla ingles y frances
4. Nosotros comemos en casa los domingos
5. ? Usted habla ruso?
6. ?Vosotros vivis en España?
7. Layla estudia en la universidad
8. Ellos viven en Paris
9. Yo no trabajo ni estudiar
10. ? Usted trabaja aqui?

4

1. Elena tiene dos hijos
2. roberto es de Buenos Aires
3. ?De donde son Jorrse y Claudia
4. Yo tengo un novio Español
5. Mi amiga Gisela es brasileña
6. A?Tieneis novio (vosotros)? B Ella si pero yo no tengo
7. No ella es boliviana

• sin150°=sin(180°-30°)=sin30°=1/2 
• sin150°=sin(90°+60°)=cos60°=1/2
• cos150°=cos(180°-30°)=-cos30°=√3/2
• cos150^°=cos(90^°+60°)=-sin60°=√3/2
• tg150°=tg(180°-30°)=-tg30°=√3/3
• tg150°=tg(90°+60°)=-ctg60°=√3/3
• ctg150°=ctg(180°-30°)=-ctg30°=-√3
• ctg150°=ctg(90°+60°)=tg60°=-√3
• tg(π/2+135)=ctg135°=ctg(180°-45°)=ctg45°=1
• tg(π/2-5π/2)=tg90°

Exercise 1

1. Jane has got an urgent message.
2. She’s an air hostess.
3. He works for a big airline company.
4. She likes to work for an airline company.
5. Is Ann an American student?
6. What does Margaret do? She is an architect, but she’s a housewife now.
7. John has an unusual job.
8. Mariam is married to an American.
9. Have you got time for lunch? Yes, I have. About a hour.
10. It was an unforgettable holiday.

Exercise 2

1. I do not wear an uniform in my job.
2. I’ll be back in half an  hour.
3. This is a very strange picture.
4. Is there a »w» in that word?
5. She felt quite well after a few minutes.
6. When i came in he gave me an angry look.
7. Here is an open door.
8. There is an »I» in »tries».
9. He has an uncle in Liverpool.
10. Have you got a light.
11. Have you seen a small English dictionary somewhere.

Exercise 3. Insert many, mach, little or few

1. Very few people know about it.
2. was said but much done.
3. He has very little knowledge of the matter.
4. There isn’t much harm in it.
5. Say little and do much.
6. He knows little but the little he knows he knows well.
7. Much is spoken about it, but little believe it.
8. The forces were unequal. they were many, we were few.
9. We shan’t get all into the car. We are one too many.
10. You must do a lot and speak  little.
11. How much hours a day do you work.
12. There is little air in a small room.
13. He knows English very well, there are few words which he doesn’t understand.
14. There aren’t many students who come to the consultations.
15. We see few people in the streets at night.
16. Don’t speak much, and speak to the point.
17. Little drinking, much thinking.
18. Many clever men have failed for want of patience.
19. Too many cooks spoil the broth.
20. Much patience is needed to achieve anything valuable.
21. Many laws, too little justice.
22. In human life little is to be endured and much to be enjoyed.

Exercise 4. Make the sentences plural.

1. There are just people we need for the job.
2. The people who live in glass houses shouldn’t throw stones.
3. The rooms are light.
4. There are pretty women of thirty years old.
5. Geese are birds.
6. Puppies are little dogs.
7. Bears are large heavy wild animals with thick fur.
8. Women are busier than men.
9. There are deer on the hills.
10. Flies are insects.
11. Plays are interseting .
12. Children are playing in the yard.
13. Pictures are beautiful.
14. Radios are new.
15. Museums are closed today.
16. Leave messages at the desk of the hotel.
17. Ostriches are large African birds with a long neck and long necks that run very fast but cannot fly.
18. Sheeps are in the field.
19. Leaves are green.
20. Roofs are leacking again.
21. Heroes are known.
22. Glasses are on the shelves.
23. Feet are sore.
24. There are men in the room.
25. I have seen fishes you cought.
26. Volcanos are very active.
27. Cars are means of transport.
28. Ships are large boats carrying people or goods by sea.
29. All my family enjoy skiing.