Choose the correct answer to complete the sentence. "Global warming occurs ______ the greenhouse gases in the atmosphere trapthe heat from the sun."

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

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Air water and soil are necessary things to our _________.

Jame Dickey’s first poem was published during he was still a senior in college

Rice is most important plant in Viet Nam

There is a widespread belief that the economical situation will improve.

A coral reef, a intricate aquatic community of plants and animals, is found only in warm, shallow, sunlight seas

The average salt content of seawater is more than three percents

Learners can feel very ...... if an exercise is too difficult.

You are listening to music, ...................  ?

Most Polar seals retreat to open water during the winter, but a few types have learn to survive on and under the ice all year round.

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

Because of the availability of trucks and easy access to modern highways, the locate of farms has become relatively unimportant with respect to their distance from markets.

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

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

Although ferns lack flowers, they do have leaves, stems, and root.

The surface conditions on Mars are the more similar with the Earth’s than those of nay other planet in the solar system

Although apples do not grow during the cold season, apple trees must have a such season in order to flourish.

Time is of few count in relation to great thoughts that are as vivid today as when they first passed through the author’s minds ages ago

The world would look eerie different if human eyes were sensitive to infrared radiation.

Rita is studying........... English and ...........math this semester.