Заемреобуемо Напишіть формули речовин за іх вимовою:
а) натрій-два-силіцій-о-три; б) ферум-бром-три; в) ферум-хлор-два, калій-0-аш.
Складіть таблицю простих і складних речовин, заповніть її формулами з поданого
переліку:
KNO, N, MgsN, CH,0, H, s, Ca, CuO, кон, Mg, C6H12.
33. Розташуйте формули речовин за збільшенням відносних молекулярних мас:
АНСІО БНСІОд В НСІ ГНСІО3
4. Установіть відповідність між формулами речовин та валентністю в них Нітрогену.
Формули
Валентність Нітрогену
1
NO
A
|
||
Б
2
NO2
III
В
3
NH3​

9. I (didn't play) the piano yesterday. I (wrote) a letter to my friend.
10. I (wasn't playing) the piano at four o’clock yesterday. I (was reading) a book.
11.He (wasn't sleeping) when father came home. He (was doing) his homework.
12. When I (was going) to school the day before yesterday, I met Mike and Pete. They (were talking) and (laughing). They told me a funny story. Soon I (laughed), too. I (was still laughing) when we came to school. After school I (told) this story at home. My father and mother (liked) it very much.
13. When we were in the country last summer, I (went) to the woods one day. It the woods I (found) a little fox cub. It could not run. It (injured) its leg. I (decided) to help the cub. I (brought) it home. Every day I (fed) in and (took) care of it. I (was doing) it the whole summer. Now the fox cub is quite well. It (left) my house. It lives in the woods again.

1.I (was working) on the final report all night.
2.I (was trying) to get in touch with you all day yesterday.
3.My car broke down while I (was driving) from Perm to Ekaterinburg.
4.I (was leaving) the building when he arrived.
5.Yesterday they (were preparing) for the seminar on Banking and Finance.

Exercise 2.
...and I am sure you will remember that in the 1990s and the company's sales (were declining), we (were losing) market share progressively,we (were not investing) enough in research and development we (were not training) our key personnel in order for them to use the new technologies.
So, when I (became) Chief Executive Officer in 2006, some tough decisions had to be taken. I (restructured) the managment hierarchy, (encouraged) early retirement, (cut) costs by 25%, (increased) efficiency by imposing greater flexibility and (closed down) three of our factories.

Exercise 3.
 1. Tomorrow at 9 o' clock we (will/shall be making) a very interesting experiment.
2. This time tomorrow I (will/shall be skiing).
3. Good luck with the exam. We (will/shall be thinking) of you.
4. Professor Brown (will be giving) another lecture at the same time next week.
5. She (will be working) here for another 5 years.
6. I (will/shall be leaving) here at 3 o' clock.