Since fireworks are dangerous , many countries have laws preventing business to sell them.

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• The ancestors of some French Americans originally came to The United State because of the French Revolution, that broke out in 1789

• With its strong claws and many protruding tooth, a gopher is an excellent digger

• The Texas Panhandle region, in the Northwestern part of the state, produces more wheat, cotton , and grain sorghum than any of other area of Texas.

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• These engines used being started by hand. But now they are started by electricity

• Foreign students who are doing a decision about which school to attend may not know exactly where the choice are located.

• If drivers obeyed the speed limit, fewer accidents occur.

• The Earth was flat, was believed by most people in the fifteenth century

• The Vermont Elememary Science Project, according to its founders, are designed to challenge some of the most widely held beliefs about teaching 

• They agreed with waiting for me if I was late.

• The steam engine is usually thought of as a relative modern invention, but the Greeks built a kind of steam engine in ancient times

• Bronze, after being heated by a strong flame, will change color, especially when exposure  to hydrogen .

• In spite of her physician handicaps, Helen Keller graduated from Radcliffe with honors

• The medical problems of parents and their children tend to be very similar to because of the hereditary nature of many diseases.

• The ancient Romans used vessels equipped with sails and banks of oars to transporting their armies

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

• David is talking to his friend, _    ?

• Choose the correct answer to complete the sentence.  "In the polluted environment, _______ diseases can be passed easily from one person to another"

• If we come home on time, our step-mother will be angry.

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

  If we will reduce the speed of population growth, there will be less pressure on the earth. 

• The international Red Cross, which has helped so many nations, won the Nobel Peace Prize three times for their efforts to reduce human suffering