Choose the correct answer to complete the sentence. "Twenty per cent of all the birds in the world ______ in the rainforest"

Many exercises such as calisthenics, running, or to swim involve producing muscle tension through a range of movements that are called isotonics.

He never goes home before he will finish his work.

When a pearl is cut in half and examined under a microscope, but its layers can be seen.

The product you bought at the lower price is more interior than the one that we sell at a slightly higher price.

The society was set up to ...... endangered species from extinction.

After the team of geologists had drawn diagrams in their notebooks and wrote explanations of the formations which they had observed, they turned to their camp-side to compare notes.

Wealthy weapeople have always desired and wear precious stones because their beauty is lasting.

The midnight sun is a phenomenon in which the Sun visible remains in the sky for twenty-four hours or longer.

Keep trying to learn English. Don’t give up. Eventually, you will succeed, even though you may not know how much time it will cost

One of the four underlined parts marked A, B, C, D in each sentence is not correct in standard English. Identify them: 

If I had known that the road were flooded, I would never have taken that way. 

Running along the 180th meridian, the International Date Line is separated one day from another

Indiscriminately dumping of waste material and inadequate sewage treatment are two serious causes of environmental pollution.

The world would look eerie different if human eyes were sensitive to infrared radiation.

I'm short, _    ?

Pictures of the surface of the planet Venus was received yesterday from the space probe “Explorer”, which was launched last year.

Abraham Lincolns boyhood home resembled those of many others midwestern pioneers, with its dirt floor, sleeping loft, and crude fireplace.

There is no limit to the diversity to be finding in the cultures of people throughout the world.

Sleeping all day, to eat too much and never going out is unhealthy.

..................United States is ...................world's biggest consumer of energy. 

Choose the correct answer to complete the sentence. "Having seen people suffer global warming consequences, people decided________ carbon footprints."