Choose the correct answer to complete the sentence. "We must _____ that people are heavily polluting the environment."

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• Choose the correct answer to complete the sentence. "He was admired for _____ donated a lot of money to environmental protection campaigns"

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

• The Egyptians first discovered that drying fruit preserved it, made it sweeter and improvement its flavor.

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• The public ceremonies of the Plains Indians are lesser elaborate than those of the Navajo in the Southwest.

• The oxygen in the air we breathe has no tasted, smell, and color.

• I would have gone with him to Washington except I had had no time

• Somehow without my noticing, my wallet had been disappeared

• After Allan had searched for twenty minutes, he realized that his jacket had been laying on the table the entire time .

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

• Those who have never been abroad is eager to see how different the other cultures are.

• When contented and occasionally when hunger, cats frequently make a purring sound

• Dislike the gorilla, the male adult chimpanzee weighs under 200 pounds.

• Sue works as .................. teacher in ...................school for .................. blind in Ireland. ........school has over a thousandpupils. 

• Per capita income is a nation’s entire income dividing by the number of people in the nation

• Migration of animals be initiated by physiological stimuli such as reproductive changes, external pressures such as weather changes, or a combination of either types of changes.

• Thanks to a considerable number of material data, we know pretty much about ancient Egypt, but few historical records of Babylon are available.

• After the police had tried unsuccessfully to determine to who the car belonged, they towed it into the station.

• Choose the correct answer to complete the sentence. "_____ clear evidence, your company couldn't deny having dump a large quantity of toxins into the sea"

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

• 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.