You have ever heard about Yuri Gagarin, ____?

To those who favorite free trade, revival of barter can suggest nothing less than a disaster.

The medical problemsparents and their children tend to be very similar to because of the hereditary nature of many diseases

The girl who were injured in the accident is now hospital.

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

Even the most discriminating gourmet will agree that food in the south is as good as any other regions in country.

We could make better ______ of our energy resources.

The symptoms of diabetes in early stages are slight that people don’t notice them

Before television became popular, Americans used to entertain each other in the evening by playing games, saying stories, and singing songs.

The Homestead Act of 1862 granted 160 of land for any settler who would spend fiveyears on the land

He gave up his job _    he earned much money.

How many people _____ in the storm a few days ago? 

The Humber River and its valley form a major salmon-fishing, lumbering, hunting , and farmer region western Newfoundland, Canada.

I’m trying to save up for a trip to Canada, so I can’t afford buying much at moment.

The homes created by  legendary architect Frank Lloyd Wright are still viewed as uniquely, innovative, and valuable.

Hailey’s comet was named after the astronomer Edmund Hailey, who was the first realize that some comets appear in regular cycle.

Having missed too many lessons _____________________________.

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

Hardly he had entered the offic when he realized that he had forgotten wallet 

 Water molecule consists of two hydrogen atoms and has 1 oxygen atom.

Each year, people around world spending billions of dollars buying merchandise on the Internet