Choose the correct answer to complete the sentence. "Deforestation is one of the _____ environmental threats to the ecological balance in the world"

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

The news today are always full of stories about people who are unhappy

There are no pouched animals in the United States but only the Opossum.

It took the mayor over an hour explanation to the other members of the board why he had missed the last meeting.

A City University Professor reported that he discovers a vaccine which has been 80 % effective in reducing the instances of tooth decay among small children.

Most of the damage property attributed to the San Francisco earthquake of 1906 resulted from the fire that followed .

An electromagnet will remain magnetized only as longer as electricity flows through it

The Nobel Prize winning candidate, accompanied by  his wife and children, are staying in Sweden until after the presentation.

The environment can be defined as all living and nonliving items in an area at a specify time.

Despite its smaller size, the Indian Ocean is as deep the Atlantic Ocean.

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

After searching for evidence in the house, the police concluded that the thief must have come in through the window and stole the property while the family was asleep.

May I ask who was that man who was leaving the office when we came in?

I'm short, _    ?

Bacteria lived in the soil play a vital role in recycling the Carbon and Nitrogen needed by plants.

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

Choose the best option:

The Earth is one of the ___ in the solar system.

Nam was playing football, _    ?

Disease is not as widespread than before because of better preventive medicine and vastly improved nutrition.

Like it or not, there is the rain and not the car that will hold the key to the future of domestic travel.