Agronomists study crop disease, selective breeding, crop rotation, and climatic factors, as well soil content and erosion.

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• Drug abuse have become one of America’s the most serious social problems .

• Because oak trees are highly resistant of storm damage, they usually live a long time

• The Library of Congress, located in the nation’s capital, houses history documents and photographs as well as most books published.

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• The Secret Garden, it is a book written years ago for children, has become popular again among adults in the film version.

• What caused the explosion in the factory it is still unknown

• The panda's ...... habitat is the bamboo forest.

• The need for a well-rounded education was an idea espoused by the Greeks in time of Socrates.

• Designers of athletic footwear finely tune each category of shoes to its particularly activity by studying human motion and physiology.

• Would you show me ................... shortest way to …………. airport 

• The capital of the United States, originally New York City, was moved to Philadelphia where stayed until 1800.

• Choose the correct answer to complete the sentence. "These companies were accused _____ having released a large amount of carbon dioxide into the atmosphere."

• I only noticed we were running lowly on petrol after we had passed the last filling station.

• Choose the correct answer to complete the sentence. "Humans now have to suffer the effects of global warming due to having_____ the environment irresponsibly"

• Choose the correct answer to complete the sentence. "Such unhygienic conditions encourage the ______ diseases"

• Even the smallest pulley can be done stronger by adding wheels to its system to create more leverage

• Intelligence , education, and experience all helps to shape management style

• We must be very careful with sensitive issues such like this, to avoid giving offence

• The firstly naval battle of the Revolutionary War was fought off the coast of Machias, Maine, in June 1775

• By the end of the month, I’ll be working for this firm for a year.

• Choose the correct answer to complete the sentence. "These companies were accused of having released a ____ amount of carbon dioxide into the atmosphere."