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

You need to study really hardly is you don’t want to fail your exams

For many years, people have wondered that life exits elsewhere in the universe.

Being the biggest expanse of brackish water in the world, the Baltic Sea is one of special interesting to scientists.

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

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

The Maelstrom is a swift and danger current in the Arctic Ocean.

They are going to do the test tomorrow, _    ?

After writing it , the essay must be duplicated by the the student himself and handed into the department secretary before the end of the month.

A police spokesperson confessed that detectives were baffled by Mr. Day’s disappearance, but were hoping to come up with an explanation

The bite of the Black Widow spider can be very inflammatory to the affected nerves that hospitalization may be required.

The word "increase” is closest in meaning to ____.

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.

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

A nation's balance of trade is considered unfavorable if it ______________ more money on imports that it gains from exports. 

Many exercises such as calisthenics, running, or to swim involve producing muscle tension through a range of movements that are called isotonics.

Several comet are discovered each year, but very few of them are bright enough to be seen without the aid of magnification

Nomadic hunter and gatherer societies have access to only a limited amount of food in an area and moved on when they have exhausted each locality.

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

Prevented the soil from erosion, the trees are planted by the farmer many years before were which stopped the flood from reaching his house.

.................. Mekong River is .............longest river in.................... Vietnam.