X. Rewrite the sentences adding the given words. Make all necessary changes.

1. She has finished the work by 3 o’clock.

2. They have left before we returned.

3. Everyone has had breakfast by the time she got up.

4. Everything has been ready long before they came.

5. We shall discuss the plan before you come.

6. You will forget about your disease by then.

7. I shall overcome my bad habit before it does me harm.

XI. Translate the first part of the sentences. Pay special attention to the adverbial phrases in the second part.

1. Они будут обсуждать (обсудят)tomorrow.

проблему парникового эффекта. while you are writing a test.

by your return.

by the time you are here.

before their scientific supervisor

comes.

2. Он выступал (выступил) сthe day before yesterday.

докладом по проблеме охраны before you came.

окружающей среды while you were receiving a foreign

delegation.

by then.

XII. Complete the following sentences:

1. By the end of October ... 2. I decided to start working after ... 3. The bell had rung before ... 4. I met my school-mate after ... 5. By the time you finish translating the article ... 6. By the end of this decade ... 7. We shall not start discussing the problem if ... 8. Before she leaves for work ... 9. He won’t be able to do this work unless ...

XIII. Put the verb in brackets in the correct tense-form:

1. “You ever (to see) any plays by O. Wilde?” “Yes, I (to see) one last week.” 2. He (to graduate) from the University in 1999. 3. By 5 o’clock they (to complete) their experiment and left laboratory. 4. By the end of the next week they (to receive) final results on the concentration of smoke in the air. 5. At last we managed to learn what (to happen) as a result of ozone depletion. 6. When we arrived, the conference (not to begin) yet. 7. It was five to ten a.m. The exhibition (not to open) yet but all the preparations for the opening ceremony (to be made). 8. I am sure by that time new methods of environmental protection (to be developed). 9. Before we joined “the Green Party”, many laws and decisions on this problem (to be adopted). 10. Much more people (to be involved) in various international organizations and “green parties” by the end of the century.

XIV.TranslateintoEnglish.

1. Когда я приехал повидаться с руководителем «партии зеленых» в гостинице, он уже дал интервью журналистам и отдыхал.

2. Когда я приехал к нему в гостиницу, мы связались с нашими партнерами по телефону и назначили с ними встречу.

3. Когда прибыл ваш факс, мы еще не получили определенного ответа по концентрации вредных веществ в воздухе.

4. Молодой ученый выполнил огромную предварительную работу по проблемам нарушения экологического равновесия перед тем, как сделал доклад на конференции.

5. К концу столетия большая часть проблем, связанных с истощением озонового слоя, будет решена успешно.

6. Когда представители большинства стран присоединятся к движению по охране окружающей среды, они примут необходимые меры, чтобы защитить наши леса, реки, озера и моря.

7. Мы узнали, что наши партнеры еще не приняли окончательного решения по проблеме сотрудничества.