What did you eat for........... breakfast this morning. 

 Scientists sent ............ expedition to ............ Mars during .......... 1990s. 

Although they reflect a strong social conscience, Arthur Miller’s stage works are typical more concerned with individuals than with systems.

James often goes swimming in the summer, _    ?

Life expectancy has increased a great deal in spite of modern medicine and technology.

By studying the fossils of pollen, which extremely resistant to decay, researchers can gain useful information about the vegetation of the past

We hadplanned to go to the movies, but, because of the amount of work I had, I spent the evening to study.

Hoover Dam in Nevada is a multi purpose structure that provides flood control, hydroelectric powerful, and drinking and irrigation water

The office …………on the weekend.

The ozone layer must be protected because it shields the Earth from excessive ultraviolet radiations

I would have gone with him to Washington except I had had no time

The world’s rain forests are being cut down at the rate on 3000 acres per hour

If I had known that you couldn’t eat eel, I ____ bought it. 

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

If it will rain this afternoon, we will have to cancel our picnic

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

Running along the 180th meridian, the International Date Line is separated one day from another

Choose the correct answer to complete the sentence. "The final product of the process of drying liquids that uses the first method will _____ small flakes"

The first vaccine ever developed was used to combat and fight a smallpox, a disease resulting from infection by a virus.

When she retires in September 1989, tennis champion Christine Evert was the most famous woman athlete in the United States

He has got several hundred bottles of wine which he keeps in the cellar below his house.