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While studying the chemistry of human body, Rosalyn Yalow won a Nobel Prize for the research she conducted on role of hormones.

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When there are low sales, companies often decide developing old products.

Choose the word or phrase with the same meaning as the underlined part.

Teachers have been asked to concentrate on literacy and numeracy.

Taking an exam ________English always makes me nervous.

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Cotton fiber, like any other vegetable fibers, are composed mostly of cellulose.

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Although they reflect strong social conscience, Arthur Miller’s stage works are typical more concerned with individuals than with many different systems

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The plans for the building complex were describing by the architects.

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The  main advertising media includes direct mails, radio, TVs, magazines, newspapers, news

Choose the corect answer to complete. " It isn't ____ for my brother to take charge of the financial burden on my family."

Choose a, b, c, or d that best completes each unfinished sentence, substitutes the underlined part, or has a close meaning to the original one.

Everyone should act ………… in order to protect our environment.

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In the sixteenth century, Francois Vieta, a French mathematician, used the vowels to represent a unknown number.

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To receive a degree from an American university, one must take several courses beside those in one’s major field

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It was suggested that Tom studied the document more thoroughly before to attempt to pass his exam.

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Both a term paper and a final exam is often required for one college class.

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Despite of many attempts to introduce a universal language, notable Esperanto and Idiom Neutral, the effort has met with very less success.

Choose the correct answer to complete the sentence. "We are totally exhausted after having finished successive _____ in only a day."

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The wooden fence surrounded his factory is beginning to fall down because of the rain.

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The peasant’s wife, who have been married for four times, has just had their third baby .

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In the early of jet development, jet engines used great numbers of fuel.

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The ozone layer must be protected because it shields the Earth from excessive violet radiations.

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With an annual income of fifty thousand dollars a year, he afford to give the luxurious life.