Chia động từ
If we (not stop).......don't stop.......... over-fishing the world's oceans,many species (become)....will become........... extinct.
Complete the sentences about the possible future for our word,using a suitable form of the verb in brackets,depending on whether you think the sentence describes something real/possible or unreal/impossible.
1) If human beings (finally start)........... living on the moon,they (need)........... to produce water artificially.
2) If there (not be).............. any money (the world be)............ a better place?
3) If we (not stop)................. over-fishing the world's oceans,many species (become)............... extinct.
Complete the sentences about the possible future for our word,using a suitable form of the verb in brackets,depending on whether you think the sentence describes something real/possible or unreal/impossible.
1) If we (recycle)....... more household waste,there (be)....... less damage to the environment .
2) If the earth (stop)......... spinning one side (always be)....... in darkness.
3) If the polar ice-cap (melt)....... completely sea levels worldwide (rise)......... by about 60 metres.
4) If an astronaut (fall)....... into a black hole in space ,what(happen)..........?
5) If people (not stop)........... using cars so much the country's road (eventually grind)............ to a standstill.
6) What (happen)............ when the world's supplies of oil (run out).............?
7) If human beings (finally start)........... living on the moon,they (need)........... to produce water artificially.
8) If there (not be).............. any money (the world be)............ a better place?
9) If we (not stop)................. over-fishing the world's oceans,many species (become)............... extinct.
10) If everyone in the world (jump).......... up and down at the same time,there(be)..............no measuarable effect ( apart from 6.5 billion footprints).
Complete the sentences about the possible future for our word,using a suitable form of the verb in brackets,depending on whether you think the sentence describes something real/possible or unreal/impossible.
1) If we (recycle)....... more household waste,there (be)....... less damage to the environment .
2) If the earth (stop)......... spinning one side (always be)....... in darkness.
3) If the polar ice-cap (melt)....... completely sea levels worldwide (rise)......... by about 60 metres.
4) If an astronaut (fall)....... into a black hole in space ,what(happen)..........?
5) If people (not stop)........... using cars so much the country's road (eventually grind)............ to a standstill.
6) What (happen)............ when the world's supplies of oil (run out).............?
7) If human beings (finally start)........... living on the moon,they (need)........... to produce water artificially.
8) If there (not be).............. any money (the world be)............ a better place?
9) If we (not stop)................. over-fishing the world's oceans,many species (become)............... extinct.
10) If everyone in the world (jump).......... up and down at the same time,there(be)..............no measuarable effect ( apart from 6.5 billion footprints).
Chia động từ
If people (not stop)........... using cars so much the country's road (eventually grind)............ to a standstill.
Wild animals (and wild plants) and the wild places where they live are seriously threatened almost everywhere. One species has become extinct in each year of this century. But many hundreds are now in danger. Lack of attention would lead to the rapid advance of the process of extinction.
Already many kinds of wild animals have been so reduced in number that their role in the ecosystem is forgotten. Animals like the great apes, the whales, seals etc. thought to be in danger of extinction.
But even more important, perhaps than individual kinds of animals and plants, whole habitats are in danger of vanishing: marshes are being drained, and the world forests, especially tropical forests are being cut down to satisfy man’s needs of timber and paper.
What would our world be like if all the wild animals and wild plants vanished? - Would our life still exist then?
1. What would happen to the human beings if the wild life vanished?
A. Many species would quickly become extinct.
B. The human life would be seriously threatened.
C. Species would go on dying out.
D. Tropical forests would be cut down.
2. What is more important than individual kinds of animals and plants?
A. the vanishing of whole habitats. B. the extinction of many species.
D. man’s need of timber and paper. C. the rapid advance of the process of extinction.
3. What does the writer caution us against?
A. cutting down the tropical forests. B. hunting wild animals.
C. draining marshes. D. destroying our environment.
4. What would happen if we cut down forests?
Cutting down forests would cause ……………..
A. the changes of temperature. B. the flood
C. both A and B are correct. D. none are correct.
5. “To threaten” in the passage means …………..
A. to pollute B. to give fear to C. to vanish D. to poison
WHY DO ANIMALS GO EXTINCT?
Different kinds of animals have appeared and disappeared throughout Earth’s history. Some animals go extinct because the climate (4)_______ they live changes. The climate may become wetter or drier. It may become warmer or cooler. If the animals cannot change, or adapt, to the new climate, they die.
Some animals go extinct because thay cannot (5) _______ with other animals for food. Some animals go extinct because they are killed by enemies. New kinds of animals are always evolving. Evolving means that the animals are changing (6) _______ from generation to generation. Small differences between parents, children, and grandchildren slowly add up over many, many generations. Eventually, a different kind of animal evolves.
Sometimes many of the animals on Earth go extinct at the (7) _______ time. Scientists call this a mass extinction. Scientists think there (8) _______ at least five mass extinctions in Earth’s history. The last mass extinction happened about 65 million years ago. This mass extinction killed off the dinosaurs.
Question 4: A. where B. which C. when D. what
Question 5: A. complete B. find C. compete D. exist
Question 6: A. accidentally B. suddenly C. quickly D. slowly
Question 7: A. same B. similar C. different D. various
Question 8: A. has been B. have been C. will be D. are
Give the correct form of the word in CAPITALS to complete each of the following sentences.
1. Stephen Hawing is one of the greatest ..........(PHYSICS) of all time. His study on the Bing Bang is famous all over the world.
2. You will never get a good job if you don't have any .............( QUALIFY)
3. Recent advances in ........(MEDICINE) science mean that many fatal diseases can now be cured.
4. Although many people have some interest in history, few of them decide to become.........(HISTORY)
5. My parents have .......(COURAGE) me to focus on social sciences and humanities
6. The number of ......(EMPLOY) over the past decade
7. His explanation about why he became a biologist did not safisfy my........( CURIOUS) at all.
8. My sister is ......( ART) and she want to become a fashion designer.
9. The possible career paths in education can be to become teachers, education ........( ADMINSTER) or curriculum developers
1. he didn’t miss the plane because he hurriedWomen can delay having children due to effective birth control methods.
A. If there are not effective birth control methods
B. , women can not delay having children
C. Unless women could delay having children there were not effective birth control methods
D. If there were not effective birth control methods, women could not delay having children
E. If there had not had effective birth control methods, women could not have delayed having children
2. He can not find a good job because he doesn’t know how to use a computer
A. If he knows how to use a computer, he can find a good job
B. If he knew how to use a computer, he could find a good job
C. If he had known how to use a computer, he could have found a good job
D. If he had known how to use a computer, he could find a good job
3. The coffee was too hot for us to drink
A. Although the coffee was so hot we could drink it
B. If the coffee were not too hot, we could drink it
C. If the coffee had not been too hot, we could have drunk it
D. Because the coffee was too hot, we drank it
4. He had spent his money carelessly and became broke
A. If he doesn’t spend his money carelessly, he will not become broke
B. If he didn’t spend his money carelessly, he would not become broke
C. If he hadn’t spent his money carelessly, he would not have become broke
If he didn’t spend his money carelessly, he would not have become broke
Chia động từ
If there (not be).............. any money (the world be)............ a better place?
