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

This is Dr. Ash calling. If anyone asks for me while I am away from the hospital, ask them to call back after four this afternoon

If it is kept dry, a seed can still sprout up to forty years after their formation

Choose the correct answer to complete the sentence. "He was admired for _____ donated a lot of money to environmental protection campaigns"

I put my new book of zoology here on the desk a few minutes ago, but I cannot seem to find it.

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

Most of the magnesium used in the United States comes from the sea water.

The ancient Romans used vessels equipped with sails and banks of oars to transporting their armies

Bronze, after being heated by a strong flame, will change color, especially when exposure  to hydrogen .

Chocolate is prepared by a complexity process of cleaning, blending and roasting cocoa beans, which must be ground and mixed with sugar.

The mayor and the council, meeting at the city hall as usual, they did not discuss the proposed new sports complex as planned .

I think she would forgive you if you ____ to speak to her. 

Nitrogen must be combine with another element such as Hydrogen or Oxygen to be useful in agriculture or industry.

In pools, goldfish are not just ornamental; since they feed on mosquito larva, they are also benefit.

His roommate is not very clever student, but he certainly works very hard indeed

That it is believed that most of the earthquakes in the word occur near the youngest mountain ranges – the Himalayas, the Andes, and the Sierra Nevada.

Under any circumstances will late arrivals be admitted to the theatre before the interval.

Thanks to a considerable number of material data, we know pretty much about ancient Egypt, but few historical records of Babylon are available.

...............January is ...................first month of the year. 

The Medal of Honor is the higher award for military bravery that can be given to any soldier of the United States

As a young man, Darwin showed little promising as a biologist.