Polio, one of a group of spin inflammations, causes fever and paralysis often resulting in disable and deform

Our nervous system has over ten billions nerve cells in network covering every inch of our skin and organs

Choose the letter A, B, C or D to complete the sentences. "We should replace fossil fuels ____________ other renewable fuels such as water, sun, etc."

Choose the correct answer to complete the sentence. "Her parents didn't agree with ______ she wanted to do."

Once the scientist had figured out the precise path of the comet, he is finding that he was able to predict its next appear

Choose the correct answer to complete the sentence. "______ disabled and non-disabled people can contribute to our community by doing voluntary work."

I put my new book of zoology here on the desk a few minutes ago, but I cannot to find it.

All the students are looking forward spending their free time relaxing in the sun in summer.

Choose the correct answer to complete the sentence. "Moby Dick, on one level the saga of the hunt for the great white whale, ______ also a heavily symbolic allegory of the heroic struggle of man against the universe"

None two butterflies have exactly same design on their wings 

Light travels from the Sun to the Earth in eight minuteand twenty seconds.

Million of people lost their jobs in the 90’s. This, in turn, caused social dissatisfaction with the politic leaders who had promised jo and prosperity

Light rays what enter the eye must be focused onto a point on the reti in order for a clear visual image to form.

Choose the correct answer to complete the sentence. "People with______ always need to be looked after."

Choose the correct answer to complete the sentence. "______ in Thanh Hoa Province, the Citadel of the Ho Dynasty was added to UNESCO's World Heritage List in 2011."

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

Can you imagine ............. alone in a very strange country?

What we know about certain diseases are still not sufficient to prevent them spreading easily among the population

There has been widespread public opposit against the plan for a new road.

A turtle differs from all  reptiles in that its body is encased in a protective Shell of their own.

Under the crustthe Earth are bubbling hot liquids that sometime rise to the surface