高中英语人教版2000年高二上09

[05:32.23]It has only one narrow entrance to the ocean in the west.
[05:37.58]One quarter of the shores of the Mediterranean are polluted
[05:43.22]and are no longer safe for swimming,as a lot of diseases are present in the water.
[05:49.99]In most places it is not safe to eat the fish.
[05:55.03]Lakes also have the same problems.
[05:58.97]Lake Baikal in Asia was once the cleanest in the world,
[06:04.54]with over 700 different kinds of plant and animal life.
[06:10.29]Now,however,the waters of this great lake,
[06:15.43]which is also the world's deepest (over 1,740 metres),
[06:22.38]have been dirtied by waste from a chemical factory.
[06:27.34]In 1989 an oil tanker hit a rock off the northwest coast of Alaska.
[06:35.21]35,000 tons of oil poured into the sea.
[06:40.77]The accident was one of the worst in history.
[06:45.32]More than 34,000 birds and 10,000 animals were killed.
[06:52.08]4,800 square kilometres of ocean were polluted.
[06:58.25]Lesson 35 1 Reading comprehension
[07:09.32]ANIMALS IN DANGER
[07:12.77]Three billion years after life began,
[07:17.24]the earth is now the home to many different kinds of living things
[07:22.80]perhaps five to ten million kinds.
[07:27.06]However,many of these are dying out.
[07:31.21]It is thought that between the years 1550 and 1950
[07:37.38]an average of one kind of living thing died out each year.
[07:42.94]By 1985 this had risen to one per day.
[07:48.40]Between 1980 and 2000
[07:53.26]we may lose another half a million different kinds of living thing.
[07:59.03]There are many reasons for animals dying out,
[08:03.47]but the most important one is the part that humans have played.
[08:08.83]First,many animals have been killed for food.
[08:13.51]many of the places where these animals used to live have been destroyed.
[08:19.36]Dry lands have been watered.
[08:22.83]Wet lands have been turned into fields.
[08:27.09]Forests have been cleared.
[08:30.43]Much land has either been changed to farmland or used for building.
[08:36.36]Polluted rivers and lakes have also been a cause of death.
[08:41.64]One example of an animal in danger is the tiger.
[08:46.50]There are three types of tiger living in China:
[08:50.76]the South China,the Northeastern,and the Bengal.
[08:55.93]In all there are probably no more than a total of 400 tigers left in China.
[09:02.98]Many of the forests where they lived were destroyed.
[09:07.55]Also,tigers were hunted
[09:11.91]and killed until in many areas the entire population had disappeared.
[09:17.48]In 1900 there were about 100,000 tigers in Asia.
[09:23.36]In 1970 when the shooting of tigers was stopped there were just 5,000 left.
[09:30.91]In India,however,the population of tigers has increased,
[09:36.37]from 2,000 in 1972 to about 5,000 in 1989.
[09:43.84]Perhaps the same progress can be made in China.
[09:48.38]3 Reading comprehension
[09:52.64]Read the text and mark all the past participles which you can find in it.
[09:58.91]A DAY IN THE FOREST
[10:02.07]Last Monday our class went on an organized trip to a forest to study the wildlife.
[10:09.44]We travelled by bus.
[10:12.60]It took us two and a half hours to get to the forest.
[10:17.35]When we arrived,we were given printed question papers.
[10:22.81]We had to fill in the answers in our notebooks.
[10:27.17]The purpose of the trip was to record all the wildlife
[10:32.35]and plants that we could find in the forest.
[10:36.60]Whenever we found an unknown plant,we had to describe it in our notebooks.
[10:42.85]If none of us knew the name of the plant,we wrote "unknown" in our notebooks.
[10:49.82]The gate into the forest was open,so we entered it.
[10:54.55]We all started looking for new types of plant.
[10:58.78]Sun Yao,our monitor and I remembered a programme
[11:03.74]that a well-known film director had made about the forest.
[11:08.89]She had shown pictures of a plant that had recently been discovered.
[11:14.35]She had not said,however,where it could be found.
[11:19.21]She said it was a well-kept secret.We decided to try and find this plant.
[11:25.87]We had our picnic lunch in the forest next to a fallen tree.