Many efforts have been made to _________the environment. 

In pools, goldfish are not just ornamental; since they feed on mosquito larva, they are also benefitcal.

Two thousand years ago, most of Western Europe was populated by a fierce, strong, artistically people known as Celts.

The teacher taught her students to look careful to the left and the right at three times before crossing the highway.

The nitrogen makes up over 78 percent of the Earth’s atmosphere, the gaseous mass surrounding planet.

Martin Luther King Jr.’s magnificent speaking ability enabling him to effective express demands for social justice for Black Americans

Find out error in each sentence: 

The better you are at English, the most chance you have to get a job with international  organizations. 

Have you learnt the reason why does water of the ocean becomes blue?

If you “make”  a “five-days”  trip across the Atlantic Ocean, your ship “enters” a different time “zone” everyday

Advertising it provides most of the income for magazine, newspapers, radio, and television in  United Statestoday.

Scientists believe that by altering the genetic composition of plants, possible to develop specimens that are resisting to diseases and have increased food value

From 1785 to 1990, the capital the U.S is located in New York City.

Although he was happily married, he preferred spending lately hours at work to spendin evenings lately t home.

The number of students attend the class dwindled until on two remained.

Monkeys use their foot to eat food, to gesture, and to climb.

The film  we saw ast night was different from that I expect.

Before bridges were built, all transport across major rivers the area were by ferryboa

In the stock market, the fluctuations in Standard and Poor’s 500 Index does not always conform to Jones Averages.

Before the information of labor unions, individual workers had almost not oice in determining their wage, hours, or working conditions

I’m just going to shops ; if anyone rings, tell them I will be back for few minutes.

Many outdoor enthusiasts enjoy canoeing or kayaking _________ recreation on ponds, lakes, and rivers.