The temperature ................. takes place varies widely from material to material.

Some scientists say that there are enough resources to _    8 billion people.

 It was late, so we decided .............. a taxi home.

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_____ hard he worked, he couldn’t earn enough money to support his family.

Are they _________ students? 

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They made an aerial survey; that is, they made a survey_________.

Sam______ to change a light bulb when he______ and______

Choose the correct answer in each sentence.

 The newly appointed president began to improve the financial  ________________  of the company by introducing several marketing strategies that set the company apart from its competitors.

The mother asked her son ........ the day before.

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People in big cities are always afraid ................. earthquakes.

China is one of the most     _ populated areas in the world.

Choose the best answer among A, B, C or D that best completes each sentence: The Sahara Desert …. for miles.

Television can make things ................ because it presents information in an things effective way.

Choose the correct answer in each sentence.

 In response to student demand, online educational opportunities have increased  ____________  in the past decade.

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Never leave work early  ____________  you have permission from your manager to do so.

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My friends come to stay ........ us ........... Christmas.

It is difficult to assess the full ........... of the damage caused by Hurricane Sandy, one of the most destructive storms the U.S. has had in quite some time.

Choose the correct answer in each sentence.

 The flooring material will serve as an essential aesthetic aspect of the interior decoration, and natural materials will create a warm ________   for the indoor living space.

The man ............ is very friendly.

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I finally the cold that I had had all week.