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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Earth is richly supplied with different types of living organisms which co-exist in their environments, forming complex, interrelated communities. Living organisms depend on one another for nutrients, shelter, and other benefits. The extinction of one species can set off a chain reaction that affects many other species, particularly if the loss occurs near the...
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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Earth is richly supplied with different types of living organisms which co-exist in their environments, forming complex, interrelated communities. Living organisms depend on one another for nutrients, shelter, and other benefits. The extinction of one species can set off a chain reaction that affects many other species, particularly if the loss occurs near the bottom of the food chain. For example, the extinction of a particular insect or plant might seem inconsequential. However, there may be fish or small animals that depend on that resource for foodstuffs. The loss can threaten the survival of these creatures and larger predators that prey upon them. Extinction can have a ripple effect that spreads throughout nature.
In addition to its biological consequences, extinction poses a moral dilemma for humans, the only species capable of saving the others. The presence of humans on the planet has affected all other life forms, particularly plants and animals. Human lifestyles have proven to be incompatible with the survival of some other species. Purposeful efforts have been made to eliminate animals that prey on people, livestock, crops, or pose any threat to human livelihoods. Some wild animals have been decimated by human desire for meat, hides, fur, or other body parts with commercial value. Likewise, demand for land, water, and other natural resources has left many wild plants and animals with little to no suitable habitat. Humans have also affected nature by introducing non-native species to local areas and producing pollutants having a negative impact on the environment. The combination of these human-related effects and natural obstacles such as disease or low birthrates has proven to be too much for some species to overcome. They have no chance of survival without human help.
As a result, societies have difficult choices to make about the amount of effort and money they are willing to spend to save imperiled species. Will people accept limits on their property rights, recreational activities, and means of livelihood to save a plant or an animal? Should saving such popular species as whales and dolphins take priority over saving obscure, annoying, or fearful species? Is it the responsibility of humans to save every kind of life form from disappearing, or is extinction an inevitable part of nature, in which the strong survive and the weak perish? These are some difficult questions that people face as they ponder the fate of other species living on this planet.
What does the passage mainly discuss?
A. Humans and endangered species
B. The importance of living organisms
C. Measures to protect endangered species
D. Causes of animal extinction
I. Choose the best answerGrass is probably the most successful living plant in the world. There are over 9,000 different types of grasses and they are A. noticed/ B. realized/ C. caught/ D. found in every region on the earth. They are the A. single/ B. one/ C. only/ D. special flowering plants that can exist in the freezing A. environment/ B. scene/ C. situation/ D. background of the Arctic and the Antarctic.Grasslands support a wide range of animal life, from tiny insects and bir...
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I. Choose the best answer
Grass is probably the most successful living plant in the world. There are over 9,000 different types of grasses and they are A. noticed/ B. realized/ C. caught/ D. found in every region on the earth. They are the A. single/ B. one/ C. only/ D. special flowering plants that can exist in the freezing A. environment/ B. scene/ C. situation/ D. background of the Arctic and the Antarctic.
Grasslands support a wide range of animal life, from tiny insects and birds to huge animals like cows and lions. All of them A. depend/ B. build/ C. turn/ D. hang on grass in one way or another.
Grass A. repeats/ B. recovers/ C. reduces/ D. remains very quickly after it is cut or A. hurt/ B. broken/ C. injured/ D. damaged. Unlike other plants, the new leaves from A. beside/ B. behind/ C. below/ D. beyond the soil, not from the topof the plant. That is A. why/ B. where/ C. what/ D. when large families of animals are able to live together in one area. As A.fast/ B. soon/ C. quickly/ D. often they have eaten all the grass there, a fresh meal is always A. available/ B. present/ C. free/ D. complete because the plants start to grow again.
Complete each sentence with a quantifier from the box. More than one quantifier may be correct.
half of ; the majority of ; the number of ; one third of ; sixty per cent of
1. Less than...the population is under the age of 35
2.....the students are online at any given time.
3. Over...the students are willing to volunteer for worthy causes.
4. An estimate of.....students in the higher classes who help younger students is 25.
PART 8. Read the text carefully, then do the tasks. It is not easy for adult students of English to improve their accent. Unlike children, who are flexible, adults often find it hard to change the way they speak. This is why even the top, or smartest adult students have difficulty with pronunciation. There are several things that an international student can do to improve his or her pronunciation. One method is to sign up for a pronunciation class. Studying pronunciation can help stud...
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PART 8. Read the text carefully, then do the tasks.
It is not easy for adult students of English to improve their accent. Unlike children, who are flexible, adults often find it hard to change the way they speak. This is why even the top, or smartest adult students have difficulty with pronunciation. There are several things that an international student can do to improve his or her pronunciation.
One method is to sign up for a pronunciation class. Studying pronunciation can help students to understand the rules of English, but in order to practice speaking, students often need to be exposed to English outside the classroom as well. This is why many students say that studying in an English-speaking country greatly affects their English. Living with native speakers can help students to learn new vocabulary as well as improve their accents. International students can also learn important cultural information. This can help to prevent misunderstandings that can occur when people from different cultures live together.
1. Adult students of English cannot improve their accents because they are slow to change.
2. Most young students are able to change their pronunciation easily.
3. Attending a pronunciation class can be little helpful to adult learners who have problems with their pronunciation.
4. All that they need to improve their pronunciation is to practice more outside the classroom.
5. To avoid confusing about cultures, students also learn important cultural information
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If a court of competent jurisdiction finds the foregoing arbitration provisions invalid or inapplicable, you and Duolingo agree that all claims arising out of or related to these Terms and Conditions must be resolved exclusively by a state or federal court located in the County of Allegheny in the Commonwealth of Pennsylvania, and you and Duolingo each agree to submit to the exercise of personal jurisdiction of such courts for the purpose of litigating all such claims. Notwithstanding the above, you agree that Duolingo shall still be allowed to apply for and obtain injunctive remedies (or an equivalent type of urgent legal relief) in any jurisdiction. LANGUAGE This agreement was originally written in English (US). To the extent any translated version of this agreement conflicts with the English version, the English version controls. MISCELLANEOUS These Terms and Conditions constitute the entire agreement between Duolingo and you concerning the subject matter hereof. In the event that any of the Terms and Conditions are held by a court or other tribunal of competent jurisdiction to be unenforceable, such provisions shall be limited or eliminated to the minimum extent necessary so that these Terms and Conditions shall otherwise remain in full force and effect. A waiver by Duolingo or you of any provision of these Terms and Conditions or any breach thereof, in any one instance, will not waive such term or condition or any subsequent breach thereof. Duolingo may assign its rights or obligations under these Terms and Conditions without condition. These Terms and Conditions will be binding upon and will inure to the benefit of Duolingo and you, and Duolingo’s and your respective successors and permitted assigns. Last revised on December 11th, 2017 Giới thiệuHọc đườngDuolingo English TestThiết bị di độngPhụ kiệnTrợ giúpNội quyViệc làmĐiều khoảnQuyền riên
1.James is quite easy- going. He can ____________ on well with many types of people.
2.Peter has been absent from school for two weeks due to his illness. It may be difficult for him to ____________ up with his classmates.
3.Did you watch the film last night? Do you know how the villain _________ back on the hero ?
4.Mr Smith decided to ______________up smoking because the doctor warned him of getting lung cancer.
5.He could______________ with all kinds of people because it was part of his job...
Đọc tiếp
1.James is quite easy- going. He can ____________ on well with many types of people. 2.Peter has been absent from school for two weeks due to his illness. It may be difficult for him to ____________ up with his classmates. 3.Did you watch the film last night? Do you know how the villain _________ back on the hero ? 4.Mr Smith decided to ______________up smoking because the doctor warned him of getting lung cancer. 5.He could______________ with all kinds of people because it was part of his jobas a receptionist. 6.Jim was sad because Jane _____________ down his invitation to the prom. 7.It is important to _____________ down on sugar consumtion every day. 8.It’s time you have to ____________ up to these problems on your own. 9.I_______________ forward to hearing from you soon. 10.Sometimes I ________________ back on my childhood and realize how happy I was as a kid.
IV. Find the mistakes in these sentences and correct them1. It is not easy of adult students of English to improve their accent.2. She has stay on her uncle’s farm for last week.3. Study hard and you will fail the coming exam.4. Nga asked Maryam whether she can speak Vietnamese.5. The Internet is a very useful mean of communication.6. Sue has applied for the job, but she isn’t very well- qualify for it.7. Do you know when comes the bus?8. You used to liv...
Đọc tiếp
IV. Find the mistakes in these sentences and correct them
1. It is not easy of adult students of English to improve their accent.
2. She has stay on her uncle’s farm for last week.
3. Study hard and you will fail the coming exam.
4. Nga asked Maryam whether she can speak Vietnamese.
5. The Internet is a very useful mean of communication.
6. Sue has applied for the job, but she isn’t very well- qualify for it.
7. Do you know when comes the bus?
8. You used to live in Los Angeles, did you?
9. Gary called yesterday and he said that he needed the report right now.
10. In winter evening, we would sit around the fire.
11. It got colder, because I turned off the air conditioner.
12. No one have gotten such high marks in writing compositions before.
Rewrite the following sentences based on the given words.1. It is necessary for me to find some information related to the Giong festival for my project.→ I (have to)2. Most of the traditional events are free for all people to join.→ People (have to)3. If we come home late, our parents will get angry.→ We (must)4. Students mustn’t cheat in any kinds of exams.→ Students (allowed)5. Students don’t have to wear uniform today because it is Saturday.→ Students (need)
Đọc tiếp
Rewrite the following sentences based on the given words.
1. It is necessary for me to find some information related to the Giong festival for my project.
→ I (have to)
2. Most of the traditional events are free for all people to join.
→ People (have to)
3. If we come home late, our parents will get angry.
→ We (must)
4. Students mustn’t cheat in any kinds of exams.
→ Students (allowed)
5. Students don’t have to wear uniform today because it is Saturday.
→ Students (need)
VIII. There is one mistake in each of the following sentences, find and correct it. If one does not have respect for himself, you can not expect others to respect him.Each of the students were made to answer some questions about the subject.Although both of them are trying to get the scholarship, she has the highest grades.Many discoveries have made in the fields of chemistry and physics.The examiner did not know whether to report the student for cheating or warning him first.
Đọc tiếp
VIII. There is one mistake in each of the following sentences, find and correct it.
If one does not have respect for himself, you can not expect others to respect him.
Each of the students were made to answer some questions about the subject.
Although both of them are trying to get the scholarship, she has the highest grades.
Many discoveries have made in the fields of chemistry and physics.
The examiner did not know whether to report the student for cheating or warning him first.