For many years, scientists studying the effects that the sun has on human skin.

Today’s nuclear fission fuels are the remnants of which used to be a much more active mixture of radioactive and fissionable materials two billion years ago and earlier

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

 Please give me ...........cup of coffee with........... cream and ........... sugar. 

The Red River, so named because of the red-colored sediment it carries, it is on of the main branches of the Mississippi.

Without any hesitation, he did a decision not to take the course

George Washington, his portrait appears on the quarter coin and the dollar bill, served two terms as president.

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.

Jason's father bought him ............ bicycle that he had wanted for his birthday. 

There are some wild roses whose flowers smell sweetly.

Because of its vast tracts of virtually uninhabited northern forest, Canada has one of the lowest population density in the world

From the airplane, passengers are able to clearly see the outline of the whole island

The Aardvark is a mammal that burrows into the ground to catches ants and termites

Bats use echoes of their own high – frequency sounds to detect food and avoiding obstacles.

AIDS can be transmitted by practicing unsafe sex and receive tainted blood from one who is already infected.

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

Choose the correct answer to complete the sentence. "In the first case, the dried material is scraped off the roller as a thin film _____ is then broken up into small, though still relatively coarse flakes."

There is a rumour that the army is about taking power, though this has been denied by government sources.

Somebody has stolen your bag, _    ?

He can speak English, _    ?

We call her as ‘Auntie Flo’, though she is not really in any relation to us