Упражнение 4.Complete the sentences A.
1. María __ (work) for aTV STATION.
2. At the moment she __ (travel) in the Sahara Desert.
3. Dan __ (love) wild animals.
4. He __ (not visit) Alaska at the moment.
5. Marta __ (not live) in Africa.
6. She __ (stay) in Africa at the moment.
7. Dad usually __ (cook) dinner.
8. My parents __ (go) to Italy every year.
9. My sister __ (walk) to school every day.
10. We __ (have) lunch now.
11. I never __ (stay in) on Saturday evening.
12. I __ (go) to the cinema now.
13. My mum __ (not work) today.
14. Peter __ (not like) rap music.
15. He __ (listen) to pop music at the moment.
16. Donna usually __ (go) shopping on Saturdays.
17. Let´s go out. It __ (not rain) now.
18. Hurry up! Everybody __ (wait) for you!
19. The sun __ (rise) in the east.
20. Water __ (boil) at 100 degrees.
21. The water __ (boil). Can you turn it off?
22. I must go now. It __ (get) late.
23. I usually __ (go) to work by car.
24. It __ (not rain) very much in the summer.
25. The moon __ (go) round the earth.
B.
1. Who is that man? What ___ he ___ (want)?
2. Who is that man? Why ___ he ___ (look) at us?
3. ___ you (believe) in God?
4. Gilbert says he is 80, but nobody ___ (believe) him.
5. Every Monday Maite ___ (drive) her kids to football practice.
6. Be quiet. Arturo ___ (sleep).
7. Don´t forget to take your umbrella. It ___ (rain).
8. I don´t like living in England. It always ___ (rain).
9. Look!. It ___ (snow). We are going to have a white Christmas.
10. Maila ___ WATCH) TV every morning.
11. I have to go now. It ___ (get) dark
12. Right now I ___ (spend) time with my father.
13.We usually ___ (go) to the gym on Mondays.
14. She ___ (talk) to Pete at the moment.
15. He ___ (look) good in jeans.
16. She ___ (wear) a dress today.
17. We ___ (drive) on the left in England.
18. I ___ (not want) to go to the Cinema.
19. We ___ (go) dancing every weekend.
20. I ___ (take) a pill every day.
21. He ___ (speak) Dutch and Italian.
22. We always ___ (stay) at the Village.
23. I ___ (need) to see the doctor.
24. Ray ___ (drink) very much coffee.
25. I ___ (not feel) very well.
C.
Рассмотрим треугольник, образованный диагоналями и меньшей стороной прямоугольника. Диагонали прямоугольника равны и точкой пересечения делятся пополам. Таким образом этот треугольник равнобедренный с основанием, совпадающим с меньшей стороной прямоугольника.
Если обозначить угол меньшего треугольника напротив основания за а, то а=180-х-х=180-2х по теореме о сумме углов в треугольнике. С другой стороны, этот угол смежный с углом, обозначенным как у, то есть а=180-у. Таким образом, 180-у=180-2х, или 2х=у.
Сопоставляя выражения 2х=у и х=у-70, получаем систему уравнений, откуда находим искомый угол х = 70.
ответ: х=70°