Read the passage below and choose one correct answer for each question.

Scientists believe they now have scientific evidence to prove that ecosystems work better when there is a greater variety of species within them. This biodiversity loss destroys natural mechanisms that could repair the damage caused by man.

Findings show that losing plants and animals is not only reducing our quality of life but actually endangering our very existence. We cut down rich rain-forests and replace them with one species plantations, such as pine and eucalyptus. We plough up meadows rich in different grasses and herbs and replace them with one grass, for instance, rye or wheat.

When a natural ecosystem is simplified the basic processes in the ecosystem are altered arid even damaged. Without their biodiversity, they are not able to serve as the natural cleaners of our planet. No longer are they able to absorb the carbon dioxide that is being produced in excess. The result is global warming, caused by the increase in the "greenhouse effect", and ultimately, or even sooner, there will be a change in the world's climate.

Which of the following is the best title for the passage?

Such(A) human activities as pollution, drainage(B) of wetlands, cutting and clearing(C) of forests, urbanization, and road and dam construction has destroyed(D) or seriously damaged available habitats.

Without(A) the particularly(B) habitat, the species could(C) not survive(D).

Chọn đáp án đúng để hoàn thành câu: 

They have built a particular reserve  which is suitable _______ pandas. 

Habitat fragmentation (A) have caused (B) plant and animal species (C) in the remaining islands of habitat to losecontact with (D) others of their own kind.

Although(A) species evolve differently, most of them adapt(B) to a specific habitat or environment that(C) best meets their survive(D) needs.

Chọn đáp án đúng để hoàn thành câu: 

When you have a small child in the house, you _______ leave small objects lyingaround. Such objects _______ be swallowed, causing serious injury or even death.

Chọn đáp án đúng để hoàn thành câu: 

We should do something immediately to conserve _______ nature.

hoàn thành câu: 

Although we are aware _______ the importance of environment, we still exploitit.   

Chọn đáp án đúng để hoàn thành câu: 

You _______ be rich to be a success. Some of the most successful people I knowhaven't got a penny to their name.

Species become extinct or endangerment(A) for a number of reasons (B), but the primary cause is the destruction(C) of habitat by human activities(D).

Chọn đáp án đúng để hoàn thành câu: 

Contamination and global warming have driven many species of animals andplants _______ the threat of extinction.

Chọn đáp án đúng để hoàn thành câu: 

If I had gone white water rafting with my friends, I _______ down the ColoradoRiver right now.  

Chọn đáp án đúng để hoàn thành câu: 

Frank's wallet is lying on the coffee table. He _______ it here last night

Chọn đáp án đúng để hoàn thành câu: 

Don't leave paraffin heaters in a draught or where they're_______.

Chọn đáp án đồng nghĩa nhất với câu sau: 

It's not necessary for you to do the test.