Задайте разделительные вопросы: 1.russian researchers have been doing much for the development of metallurgy as a science 2.the main building of our institute isn't lenin street 3.second-year student will study physical metallurgy next year 4.olga takes many subjects at the institute 5.students understood a new rule

1.Russian researchers have been doing much for the development of metallurgy as a science, haven`t they?
2.The main building of our Institute isn't in Lenin Street, is it?
3.A second-year student will study physical metallurgy next year, won`t he?
4.Olga takes many subjects at the Institute, doesn`t she?
5.Students understood a new rule, didn`t they?

1. Напишіть форми дієслова у Present Perfect Continuous.

2. I am tired I all day. digs) 6. You are out of breath. ? (you runes)

3. How long here? (you waited) 7. We here for 12 years. (lived)

4. I here since 6 o‘clock. (stander) 8. Your eyes are red. ? (you cry)

5. How long Chinese? (you learner) 9. How long ? (the children sleep)

6. She English for 5 years. (studys) 10. What _ all afternoon? (you do)

2. Напишіть форми дієслова у Past Perfect Continuous.

1. The cows were tied. They on the field all day long. (graze)

2. The sows all morning long, before they went to drink. (eat)

3. Before bears woke up in spring they all winter long. (sleep)

4. Animals on the litter before farmers washed them. (couch)

5. Milkmaids cows for long hours before their working day was over. (milk)

6. Animals in the barn for a long time, before farm workers fed them. (bellow)

7. Horses in the stables for the whole day before they were released for the run. (stand)

8. Pigs happy in the pigsty the whole morning, before they were give succulent foods.( sleep)

9. Cat and dog play on the grass the whole day, before their owner gave them some food. (couch)

10. Hog dry foods all winter, before the farmers started feeding it succulent foods. (eat)

Объяснение:

Конституция США 
Согласно конституции власть была разделена на три ветки национального правительства: законодательная (Конгресс), исполнительная (Президент) и судейская (Верховный Суд). Каждый получил свою власть.
Эти три установления создали систему сдержек (или сдержок) и противовесов. Эта система позволяет каждой ветви контролировать две других. Например, Президент имеет право наложить вето на акты (законы) Конгресса, но Конгресс может отменить вето в две трети голосов. Но Верховный Суд может объявить недействительными акты конгресса (или любого законодательного органа) или указы президента, если они не соответствую конституции.