The health of the ozone layer.

If we were to assume the role of a physician in order to diagnose the health of the ozone layer, no doubt we would state that our patient is in very poor health, and that the patient's condition is getting worse.

• In 1995, 1996 and now in 1997 we have experienced record ozone depletions over both the Southern and Northern hemispheres.

• The 1996 Antarctic ozone hole reached a record 10 million square miles - an area greater than the total surface area of North America, and twice the size of Europe.

• During November and December of 1996, ozone levels over Northern Europe and the north Atlantic were 20% lower than the average measurements between 1957 and 1970. More than 25% ozone depletion was measured over some populated areas.

• Following the trend, in March 1997, the ozone layer was 15 to 25 percent thinner over the Arctic than it was a year earlier, and Environment Canada reported a record of nearly 40% ozone depletion over the North West Territories.

• The European Commission's Environment and Climate Programme reported in May, 1997, that "For the third winter in succession, record low temperatures in the Arctic's lower stratosphere, coupled with the presence of man-made pollutants, have resulted in...up to 40% ozone depletion in the Northern Hemisphere... (with) total ozone as low as 270 Dobson Units near the pole during March this year."

Of further concern is the recurrence of extremely cold spring time temperatures over the Arctic, which is a precondition for increased ozone depletion. The European Commission noted that "Analyses of stratospheric temperature data shows that the stratosphere during March 1997 was by far the coldest on record. The average monthly mean over the Pole was some six degrees lower than the previous minimum average. These very low temperatures in the Arctic springtime for the third successive year give rise to the concern that they may be part of a longer-term trend. It is important to understand whether, for example, this represents part of changes induced by chemistry-climate feedback.

Вариант 13

Задание 1. Измените число существительных с единственного на множественное и внесите соответствующие изменения в остальные члены предложений.

1. I have hurt my foot.

2. This shelf contains several books on different subjects.

3. The leaf turned first yellow and then brown, and dropped off and was blown into the corner of the garden.

4. We have built a gigantic factory.

5. The cat has caught a mouse.

6. The child came into the room.

Задание 2. Измените форму прилагательных, данных в скобках, и переведите предложения на русский язык.

1. Which of the boys is the (tall)?

2. Richard got (few) marks than Fred in the examination.

3. A train goes (fast) than a ship but not as (fast) as an aeroplane.

4. This coat is the (expensive) of all.

5. He is also (polite) person than Paul.

6. The younger you are the (easy) it is to learn.

Задание 3. Вставьте модальные глаголы may, can, must, need.

1. He ... run to school.

2. You ... eat in the classroom.

3. ... I have some juice', please?

4. You ... not do such things.

5. You ... come at 6 o'clock.

6. You ... help your little brother.

Задание 4. Поставьте глаголы, данные в скобках, в нужную форму.

1. The cook (to taste) the soup to see if it is right.

2. How much money have you (to save) for the holidays?

3. The Royal Carriage (to come) round the corner.

4. On Sunday we sometimes (to go) to the cinema or a disco club.

5. My cousin (not to live) in Moscow.

6. My mother (have) a headache since she came from the' theatre.

Задание 5. Переведите предложения на английский язык.

1. Он спросил меня, где я был и что делал.

2. Я уверен, что он придет, если вы попросите его.

3. К 3 часам он ответил только на половину писем, которые получил в то утро.

4. Пока у нас не было неприятностей.

5. Я никогда не видел ее сердитой.

6. Моему отцу в мае исполнится 50 лет.

Задание 6. Образуйте отрицательную и вопросительную формы предложений.

1. They have a baseball team.

2. She had long, dark hair.

3. She was wearing a pretty pink dress.

4. During the day I work as a film editor in Hollywood.

5. The children help replant these trees.

Задание 7. Задайте вопросы к каждому члену предложения.

1. I eat five pieces of fruit a day.

2. Jamie has a new computer.

3. He sometimes called me up in the middle of the night

4. By the end of May I will have written 10 essays.

5...I asked the policeman standing on the corner.

Задание 8. Задайте общий, специальный, альтернативный и разделительный вопросы к каждому предложению.

1. He discusses many questions at the office.

2. They will return home later than usually tomorrow.

3. The doctor is very busy; he won't be able to see any more patients today.

4. We were allowed to stay at home.

5. We'll return these books to the library tomorrow.

Задание 9. Переведите текст на русский язык.