人教课标版高中英语选修8Unit2Using Language(共28张PPT)

C. Droved people crazy D. Scared
2. From time to time people suggest that extinct
animals… B
A.There was a time when B. Occasionally
C. All the time
D. Each time
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True or False
1. Scientists are still experimenting with cloning mammals because they think it can make money. F
2. The animals that have disappeared from the earth, like dinosaurs, can be brought back to life through cloning. F
The return of Dinosaurs?
Listen to the tape and underline the sentences
that show the writer’s attitude towards cloning
extinct animals and the return of dinosaurs. 1. But in fact we re a long way from being able to clone extinct animals. Scientists are still experimenting with cloning mammals. 2.Unfortunately, with what we know now, this is either impossible or unsuitable. 3.So the chances of dinosaurs ever returning to the earth is merely a dream.
3. People suggest that dinosaurs, can possibly
be brought back to life. D
A. Kept up
B. resist
C. live on
D. relived
4. The initial requirement is that you need
Choose the best answer.
The writer of the text __C___. A. is excited by the possibility of cloning
fierce and extinct animals B. believes that extinct animals can be
2. Which of the following is true? D A. Mice were cloned in 1979. B. Dolly the sheep was the first cloned animal. C. The name of the cloned cow is “Bison”. D. China was successful in cloning mammals.
3. The reasons why a group of cloned animals all die of the same illness do NOT include _C___. A. they have the same arrangement of genes B. there isn’t enough diversity in the group for it to overcome illnesses C. the illness is a new one D. their arrangement of genes can not resist that new disease
4. We can infer from the text that __B__. A. scientists are experimenting to clone dinosaurs B. dinosaurs will never return to the earth C. cloned animals will only live in the zoo D. the DNA of dinosaurs can only survive 10 000 years
3. Why is it wrong to clone an extinct animal if it would live in a zoo?
1. Why is it either impossible or unsuitable to clone extinct animals?
Reason 1: You need perfect DNA. Reason 2: There is not enough diversity for
Choose synonyms(同义词)
1. It proves how the idea struck a mixture of
fear and excitement into people’s hearts.
A A. had a strong impression on sb B. Confused
3. If we can clone any extinct animals, we should let them live in a zoo. F
Choose the best answer.
1. The film Jurassic Park is popular because ____A___ . A. people are interested in the subject of cloning B. all the actors are dinosaurs C. it was directed by a scientist who clones dinosaurs D. it proves very interesting
1. Why is it either impossible or unsuitable to clone extinct animals?
2.Why shouldn’t you clone an extinct animal unless there is enough diversity in the group?
cloned animals to overcome new diseases. Reason 3: It would be unfair to clone any extinct animals if they would have to live in a zoo.
2.Why shouldn’t you clone an extinct animal unless there is enough diversity in the group?
Put the following in the 5. research usionrgdtheer eomfbtrimyoes .of mice
4. first experimental clones of cows 8. first experimental clones of mice 7. work on the embryos of sheep and mice 2. China’s first cloned twin calves 3. cloning of frogs 6. first clone of a mammal 1. cow gave birth to a bison
A. helpless B. useless
C. meaningless
6. Others will pass on the ability to resist that
disease. A A. fight against
B. slide
C. hire
D. indicate
7. The chance of dinosaurs ever returning to
perfect DNA. D A. Most thankful B. most pressing
C. most difficult D. most needed
5. All efforts of cloing an animal will be in vain
if there is not enough diversity. B
brought back to life by cloning C. thinks it impossible or unsuitable to clone
extinct animals like dinosaurs D. dreams of dinosaurs returning to the
earth
Unit 2 Cloning
Using Language
霸王龙 tyrannosaurus
剑龙 stegosaurs
雷龙 brontosaurus
翼龙pterodactyl
Look at the following pictures and think which film they are from.
They would have the same arrangement of genes and so might die of the same illness.
3. Why is it wrong to clone an extinct animal if it would live in a zoo?
It is not a good idea to clone an animal that would live in a zoo because it is not a suitable habitat to develop and increase its numbers.The zoo is not a natural environment for a wild animal.
the earth is merely a dream. A
A. only
B. surely
C. abruptly
Hale Waihona Puke D. miserablyHomework
Read the text again and underline the words, Phrases and sentences that you have difficulty In understanding.
1. Have you ever seen the film Jurassic Park? Do you like this film? Why?
2. Do you like dinosaurs? Can you see them in our real life? Why?
3. Do you think it is possible to clone dinosaurs? If not, why? If yes, do you think that’s good for human beings? Why?