Unit 10. Endangered species

UNIT 10: ENDANGERED SPECIES
A. VOCABULARY: Choose the best answer A, B, C or D to complete each sentence.
1. One of the primary causes of species extinction are habit .............
A. destruction
B. protection
C. contamination
D. conservation
2. The river is ............... by chemicals released from the factory.
A. disappeared
B. damaged
C. contaminated
D. threatened
3. The new railway is still under .............
A. construction
B. establishment
C. exploitation
D. urbanization
4. Many governments have enacted laws to protect ........... species.
A. disappeared
B. endangered
C. contaminated
D. destroyed
5. Toxic chemicals in the air, land and water have also .......... many species to the verge of extinction.
A. taken
B. guided
C. driven
D. developed
UNIT 10: ENDANGERED SPECIES
6. Hippos are uniquely ................ to drought
A. adaptable
B. suitable
C. adjustable
D. vulnerable
7. A species that faces ................ is one that may become severely endangered or even extinct.
A. exploit
B. exploitation
C. overexploitation
D. exploiter
8. Humans depends on ............. such as ancient forests to purify their air, clean their water, and supply them with food.
A. biodiversity
B. ecosystems
C. reserves
D. evolution
9. Our national heritage of biological ............. is an invaluable and irreplaceable resource.
A. environment
B. division
C. diversity
D. atmosphere
10. Many people in the United States participate in wildlife-related ........ including observing, feeding and photographing wildlife.
A. conservation
B. exploitation
C. protection
D. recreation
UNIT 10: ENDANGERED SPECIES
B. GRAMMAR.
MODAL VERBS: may/ might/ must/ mustn’t/ needn’t
1. MAY/ MIGHT:
 We use may/ might for an certain prediction or intention.
Ex: You may/ might get stuck in the traffic if you don’t start early.
I’m not sure, but I may/ might drive up to London on Saturday
 We use may/ might to say that something is possibly true.
Ex: This old picture may/ might be valuable.
That may not/ might not be a bad idea.
NOTE: There is almost no difference in meaning between “may/ might”, but “may” is a little stronger than “might”.
UNIT 10: ENDANGERED SPECIES
2. MUST/ MUSTN’T
a. Must. Must do is usually is a kind of order, a way of telling someone to do something
Ex: You’ve got exams soon. You must work. (order)
b. Mustn’t.
Mustn’t: Forbid someone to do something (Prohibition)
Ex: Students mustn’t use dictionaries in the examination.
(= Using dictionaries in the examination is prohibited)
Mustn’t: Tell someone not to do something.
Ex: You mustn’t forget your rail card.
(= Don’t forget your rail card.
UNIT 10: ENDANGERED SPECIES
3. NEEDN’T
We use “needn’t” to say that something is unnecessary
Ex: You needn’t take me to the station. I can walk.
You needn’t always make an appointment.
UNIT 10: ENDANGERED SPECIES
C. COMPREHENSION: Read the passage carefully then choose the correct answer.
In today’s world, thousands of plants and animals are in danger of extinction, and the number of species are at risk increases every year. Not all plants or animals existing in small numbers are endangered at their population may not be decreasing or threatened. An endangered species is one which is expected to die out within twenty years un less special measures are taken to protect it. Endangered animals include blue whales, giant pandas, orange-outans, rhinoceroses, snow leopards, tigers and some of crocodiles. Endangered plants include some species of cactus.
Why are the above species of animals endangered? There are now legal limits on hunting, but not all species are protected by law. Even when animals are legally protected, illegal hunting for fur, tusks and horns continues. Those animals that are not killed are captured and sent to zoos or sold as pets. For example, the little blue macaw, a
UNIT 10: ENDANGERED SPECIES
Parrot native to Brazil, has been captured in such numbers for private bird collectors that it is almost extinct in the wild. In addition to this, many species’ habitats are eliminated when people clear land in order to build on it, or when they introduce domestic and non-native animals which overgraze the vegetation and even prey on birds and mammals which are already at risk of extinction.
Why is it important to save endangered species? Firstly, nature is delicately balanced, and the extinction of one species may have a serious effect on others. Secondly, it is the fault of mankind that so many species are endangered, so it is our responsibility to protect those species while we still can. We must stop the hunting of wild animals and the destruction of the forests before it is too late. It is worth making an effort – by saving endangered species we could be saving ourselves.
UNIT 10: ENDANGERED SPECIES
According to the passage ..........................
More and more species become extinct every year
B. All plants and animals are expected to die out in 20 years if we don’t take measures to protect them.
C. Blue whales have become extinct.
D. Only animals species are seriously threatened with extinction.
2. According to the author, all species mentioned are in danger because ...........................
They are not protected by laws.
B. they are not kept in wild reserves.
C. Illegal hunting has been eliminated
D. Laws on hunting and wildlife conservation are not strictly obeyed
UNIT 10: ENDANGERED SPECIES
3. The author uses the blue macaw as an example of ..................
a species that has completely died out.
B. a species of birds killed by hunters.
C. birds captured for the pet trade.
D. birds captured for zoos.
4. According to the author introducing domestic, non-native animals ...............
is not associated with endangered species.
B. may threaten the habitats of some species.
C. is only dangerous in tropical forests.
D. is the only reason why some species habitats are destroyed
UNIT 10: ENDANGERED SPECIES
5. It can be inferred from the last paragraph that endangered species ................
Will definitely die out soon.
B. Can not be saved because we need to save ourselves.
C. Play an important part in the natural world.
D. Have a bad effect on other species.
*Keys: 1.A 2.D 3.C 4.B 5.C