Choose the correct answer to complete the sentence. "One of the main greenhouse gases that lead to global warming _____ carbon dioxide"

The purpose of traveler’s checks is to protect travelers from theft and accidental lost of money.

What exactly is the influence of air pollution ...... human beings?

Short-wave radios that can receive and transmit signals are used by pilots, the police, and amateur operator .

The common field mouse is about four inches long and has a three – inched tail.

In the sixteenth century, Francois Vieta, a French mathematician, used the vowels “a”, “e”, “i”, “o”, “u” to represent a unknown numbe

Without the life-jackets, most passengers _____ drowned in that accident.

If the airplane ticket wasn’t expensive, I could fly to Singapore for my holidays.

Among the parameters that determine whether an environment is suitably for life as we know are temperature, water availability, and oxygen content.

To save the California condor from extinction, a group of federal, local, and privately organizations initiated a rescue program.

The examination will test your ability to understand spoken English, to read non-technical language, and writing correctly

Some children, before going to school, go to kindergartens, officially are called nursery schools.

Mary found it hard to concentrate on her work because the noise .

The film is boring, _    ?

The term “metabolism” refers to the chemical changes which by living things transform food into energy

In England as early as the twelfth century, young boys enjoyed to play football.

He usually travels to..................Philadelphia by.................. train. 

Dinosaurs are traditionally classified as cold-blooded reptiles, but recent evidence based on eating habits, posture, and skeletal structural suggests some may have been warm-blooded.

Due to the government’s policy, some farming are as have been abandoned

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.

Before dinosaurs became extinct, plant life is very different on Earth.