Cotton fiber, like other vegetable fibers, are composed mostly of celose.

Even the smallest pulley can be done stronger by adding wheels to its system to create leverage

Choose the correct answer to each of the following questions. "Visitors with more_______ travel budgets can enjoy the comfort of five-star hotels and luxury cruise ships."

When scientists discovered how soap works, it became possible to do synthetic deter out of Petroleum.

If the Oxygen supply in atmosphere was not replenished by plants, it would soon be exhausted

Choose the letter A, B, C or D to complete the sentences. "This exercise is very boring. I wish the teacher ______ us some more interesting things to do."

The very first night I was in Australia, I couldn’t have slept until earl morning

Salt was too scarce and precious that it was used as money .

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

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

Choose the best option:

The most magnificent feature of Taj Mahal ____ is the central dome.

This is Mr. Jones, ............. invention helped a lot of deaf people. 

Petroleum  is composed of cmplex mix of Hydrogen and Carbon.

Superior to all others woods for shipbuilding, teak also used for furniture, floorin, and general construction

The Sears Tower is  .........  building in Chicago.

It took the mayor over an hour explanation to the other members o the board why he had missed (last meeting.

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

Deep cratered, the moon is over 2100 miles in diameter negligible gravity and atmosphere

Under the crustthe Earth are bubbling hot liquids that sometime rise to the surface

The world oceans have risen on average of 6 inches over the 100 years, which has been considered as an evidence that global warming has an effect.

Choose the correct answer to complete the sentence. "The Braille alphabet has been one of the _______ inventions in human history"