Спишіть, вибираючи правильну часову форму.

1. Atomic energy (will have been supplying / supplied) power for lighting cities for many future years to come.

2. During many years Ukrainian scientists and engineers (have been making / made) big advances in science and technique.

3. This student (has been studying / studies) at our University since 2006.

4. The best architects of Sumy (had been discussing / have discussed) the plans for the new multi-storey buildings and shops several times before their construction.

5. Petro Orel who (had been taking / took) part in these constructions entered our University four years ago.

6. Since December 1990 our country (has been changing / changed) its appearance greatly.

7. By the first of September this year the second year students (will have been studying / will study) here for two years.

8. My friends (will have been learning / will learn) English for two years more before they pass their state examination.

9. The Ukrainians (have been raising / have raised) standards of their life all these years.

10. We have heard the agronomists (have been working / had worked) on the development of new sorts of winter wheat since the end of the twentieth century.