Each chemical element is characterized to the number of protons that an atom of that element contains, called it atomic number.

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• In human beings, as in other mammal, hairs around the eyes, in ears and in the nose prevent dust, insects, and other matters from entering these organs.

• She sighed with relief when she found out that she has passed the difficult test.

• Nga speaks English very well, _    ?

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• He never goes home before he will finish his work.

• A thunder usually follows lightning by five seconds for every mile between the flash and the observer.

• The strongly patriotic character of Charles Sangster’s poetry is credited about greatly furthering the cause of confederation in Canada

• Most countries depend to few extent on cereal imports to augment their own crops.

• Gunpowder, in some ways the most effective of all the explosive materials, were a mixture of potassium nitrate, charcoal, and sulfur

• The basic elements of public-opinion research are interviewers, questionnaires, tabulating equipment, and to sample population

• Mr Ross, our old history teacher ruled his classes by a rod of iron!

• I’m sorry I missed seeing my old friend at your party. I wish I ______. 

• The government’s budget maybe considered balanced when the amount of money it spends does not exceed the amount it receives.

• Under any circumstances will late arrivals be admitted to the theatre before the interval.

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

• .................gold is perhaps .............. most highly treasured metal. A. the / X B. X / the C. the / the D. X / X

• In The Sociology of Science, now considered a classic, Robert Morton discusses cultural, economy and social forces that contributed to the development of modern science .

• Floyd Bennett was a pilot for two of the Arctic expedition of the 1920’s and the first pilot to fly over the North Pole.

• There are a lot of people attending the wedding party, _    ?

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

• The discovery of the antibiotic penicillin in 1928 has not produced antibiotics useful for the treatment of infectious diseases until 1940.