重点词汇:astronomy system religion theory billion globe violent atmosphere unlike fundamental harmful exist thus puzzle biology gravity satellite climate crash pull float mass presence dissolve reaction extinct lessen weigh exhaust match obvious feed
重点词组:
in time lay eggs give birth to in one’s turn prevent…from block out cheer up now that break out watch out cheer up get the hang of
the origin of life begin with cool down dozens of millions of years ago all sorts of for the first time be different from escape from as a result of there used to be
do some research make up die out a visit to be off in all directions
重点句子:
1.Why they suddenly disappered still remains a mystery.
2.We shall feel its gravity pulling us, but it will not be as strong a pull as the earth’s.
3. We watched, amazed as fire broke out on the outside of the spaceship as the earth’s gravity increased.
4. Weather life will continue on the earth for millions of years to come will depend on whether this problem can be solved.
5. The earth became so violent that it was not clear whether the shape would last or not.
6. This produced a chain reaction, which made it possible for life to begin to develop.
7. As a result of this, many scientists believe the earth may become too hot to live on.
8. What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.
9. Others, called amphibians, were able to live on land as well as in the water.
10. How life began on earth is one of the biggest puzzles that scientists found hard to solve.
11. As a result of this event, a great dust cloud formed in the sky blocking out the sunlight.
12. … I found I was carried twice as far as on the earth…
Exercises:
1.It is general believed that teaching is it is a science.
A.an art much as B.much an art as
C.as an art much as D.as much an art as
2.The computer is in bad condition I can’t work with it.
A.so;that B.such;that C.too;that D such a;as
3.He was absent for weeks,so he had a lot of homework to .
A.make out B.make up C.make of D.make over
4.Something must be done to prevent factories poisonous gases so as to keep the city . A.sending out;from polluting B.send out;polluting
C.from sending out;from polluting D.sending out;from being polluted
5. he can pass the entrance examination is quite uncertain.
A. If B. Whether C. That D. What
6 makes this shop different is that it offers more personal services.
A. What B. Who C. Whatever D. Whoever
7. What we used to think impossible now does seem possible.
A. is B. was C. has been D. will be
8. As the busiest woman in Norton, she made her duty to look after all the other people’s affairs in that town.
A. this B. that C. one D. it
9. The old man was unfortunately knocked down by a car and badly ______.
A. damaged B. harmed C. injured D. wounded
10. ______ you are free tonight, why not go to the movies with me?
A. even if B. for C. because D. now that
11. That boy _____ under the tree ____ that he ______ his football on the playground.
A. laying; lied; lied B. lying; lied; had laid
C. lied; laid; had lain D. lying; lay; had lain
12. Some parts in south China have experienced ______ this year as they did last year.
A. twice as much rain B. rain twice as much C. as twice much rain D. twice rain as much
13. This kind of animal will ___ if we don’t take measures.
A. die of B. die from C. die out D. die down
14. We haven’t settled the question of ______ it is necessary for him to study abroad.
A. if B. where C. whether D. that
15. ______ was most important to her, she told me, was her family.
A. it B. this C. what D. as
16. The Germans are eating ______ vegetables per person today as they did before.
A. more than twice B. more than twice as many
C. twice over as much D. over twice as much
17. She felt as if she ______ in the air when walking in the spaceship.
A. floats B. were floating C. is floating D. were floated
18. He made up his mind to devote his life ________ pollution _______ happily.
A . to prevent ; to live B. to prevent; from living
C. to preventing; to live D. to preventing; from living
19. I must hurry. I want to get home________ to see the football match on TV.
A. at times B. in time C. any time D. just then
20. ____ sometimes keeps her awake at night _____ Tom is getting more and more quiet at home.
A. that; which B. it; that C. whether; that D. what; that
21. It was the study of history ____ the social science.
A. gave birth to B. caused to C. that gave birth to D. that cause
22. Some policeman should be sent to _______ them _____ the trees.
A. prevent; to cut down B. stop; cutting down
C. keep; to cut down D. keep; cutting down