John and Mary went to........... school yesterday and then studied in ........... library before returning home. 

Before the formation of labor unions, individual workers had almost not voice in determining their wages, hours, or working conditions.

Choose the correct answer to complete the sentence. "Having seen people suffer global warming consequences, people decided________ carbon footprints."

Choose the correct answer to complete the sentence. " Carbon dioxide is one ---- the primary greenhouse gases that cause global warming."

The extraordinary beautiful of orchids makes them the basis of a multimillion-dollar floral industry .

Had I known the carpenter was going to take three days to show up, I ___________ the materials and done the work myself. It would be finished by now. 

“Gone With the Wind”, the epic novel about life in South during the Civil War period, took ten years write.

Choose the best option:

Deforestation is destroying large areas of tropical rain forest.

The company suffered substantial losses after the stock market crash and found it difficult for recovering.

The biologist found some pollutants, a little of which can be considered very harmful to fish and other living organisms in the river.

Mary found it hard to concentrate on her work because the noise .

Choose the best option:

The____ is the air, water and land in or on which people, animals and plants live.

Nomadic hunter and gatherer societies have access to only a limited amount of food in an area and moved on when they have exhausted each locality.

Most pines grow rapidly and form straight, tall trunks that are ideally for lumber

It is the writing English that causes difficulties to foreigners

Government money appropriated for art in the 1930’s made possible hundreds of murals and statues still admiration in small towns all over the Unites States.

Above 80 percent of the laborers at the construction site are temporary workers.

Although she is 103 but, she still does a lot of work in the flat.

Two unique features of the Arctic they are lack of precipitation and permanently frozen ground.

A computer networks usually includes either selected employees of a particular business or or people who do not work together but have similar interests.

There is nothing to eat, _    ?