Geologists find it useful to identification fossils in a rock sample because certain assemblages of species are characteristic of specific geologic time periods

Deciduous trees are ones that lose its leaves in the autumn and grow new ones in the spring.

I found it difficult convincing the ticket inspector that I had lost my ticket, but he believed me in the end

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

The orangutan’s hands and feet arc designed for holding and grasping branches, dud its powerful immensely arms enable it to climb and swing in trees without difficulty.

The most visible remind of the dose relationship between the United States and France is the famous Statue of Liberty, which stands in New York Harbor.

Psychologists at the University of Kansas has studied the effects of the color of a room on people’s behaviors

Afterwards I’d read the manual, I found I could use the computer easily

After driving a car for ten miles, John suddenly realized that he has been driving in the wrong direction

...........Lake Erie is one of five Great Lakes in ........... North America 

President Wilson had hoped that World War I be the last great war, but only two decades later, the Second World War was erupting

The Library of Congress, located in the nation’s capital, houses history documents and photographs as well as most books published.

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

At the Hermitage, Andrew Jackson’s home in Tennessee, even his glasses have been left exactly where he lay them .

There are only ...........few seats left for …………… tonight's musical at ...........university. 

None two butterflies have exactly the same design on their wings.

If the lecture ____ so quickly, we’d have understood his speech.

Choose the correct answer to complete the sentence. "Such unhygienic conditions encourage the ______ diseases"

Hardly he had got downstairs when the phone stopped ringing yesterday afternoon.

Alike other forms of energy, natural gas may be used to heat homes, cook food, and even run automobiles

Chicago’s Sears Tower, now the tallest building in the world, rises 1,522 feet from the ground to the top of it antenna.