Đề 19: Đề thi toefl itp 15 câu đầu

Many scientists believe _____ as a result of a collision between the newly formed Earth and a large asteroid.

 
 
 
 

The organ-pipe cactus is _____ in the United States.

 
 
 
 

Willa Cather,_____, gained recognition for her books concerning the American frontier.

 
 
 
 

The average wavelength of visible light is 2,000 times _____ the diameter of an atom.

 
 
 
 

_____ ants live in nests, which may be located in the ground, under a rock, or built above ground and may be made of twigs, sand, or gravel.

 
 
 
 

Giant corporations __to dominate the United States economy in the late nineteenth century, grew steadily larger during the 1920%.

 
 
 
 

The tradition of the bowhead whale hunt __back a thousand years and is a vital part of Inuit culture.

 
 
 
 

.__the son of an impoverished farmer, was born on Long Island.

 
 
 
 

Insulin is manufactured by specialized cells in the pancreas and released __glucose reaches a certain concentration in the bloodstream.

 
 
 
 

One of the basic principles of wildlife conservation involves __adequate natural food and shelter to maintain populations of each species in a given habitat.

 
 
 
 

The decimal numeral system is one of the _____ ways of expressing numbers.

 
 
 
 

Emily Dickinson’s garden was a place _____ great inspiration for her poems.

 
 
 
 

The mountains surrounding Los Angeles effectively shield the city from the hot, dry winds of the Mojave Desert, _____ the circulation of air.

 
 
 
 

Not only _____ to determine the depth of the ocean floor, but it is also used to locate oil.

 
 
 
 

Nebraska has floods in some years, _____.

 
 
 
 

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