Choose the best option:

We have to suffer a lot of floods due to our serious _____ of forests.

To assure the safely of those workers who must handle radioactive materials, the employer should not leave them enter contaminated areas without protective clothing.

...........big books on ...........table are for my history class. 

Long prized for its medicine value, ginseng these days has become the most common of energy-boosting drinks particularly for high- performance athletes.

Hardly he had got downstairs when the phone stopped ringing yesterday afternoon.

...........Lake Erie is one of five Great Lakes in ........... North America 

The plans for the building complex were describing by the architect

Choose the correct answer to complete the sentence. "Global warming has ______ impact on water supplies."

Choose the correct answer to complete the sentence. "______ they stopped deforestation, it might help prevent global warming"

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.

The builders of the variety ancient cliff ruins scattered throughout the canyons and mesas of the arid Southwest of the United States are known as the cliff dwellers.

A traveler can reach some of the village along the Amazon only by riverboat.

When I was a secretary, the boss often made me to stay in the office in the evenings.

The bell signaling the end of the first period rang loud, interrupting the professor’s closing comments

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

Alike other forms of energy, natural gas may be used to heat homes, cook food, and even run automobiles

Ocean currents that help transfer heat from the equator to the poles, thereby creating a more balanced global environment.

Unlike wood, paper, and fabric which tendency to disintegrate after being buried for many years, ceramics and glassware although easily broken, survive well in the ground.

Polio, one of a group of spinal inflammations, causes fever and paralysis often resulting in disabled and deformity.

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

The vase has the same design, but it is different shaped from that one.