One of the four underlined parts marked A, B, C, D in each sentence is not correct in standard English. Identify them: 

If drivers obeyed the speed limit, fewer accidents occur. 

Our primary goal is to teach students to discover the truth. But we have also other aims, such as providing them with knowledge or to teach them to work consciously

Do you think what people have smoked less and less?

Before the Industrial Revolution come to America, the vast majority of the population had lived in rural areas

...............January is ...................first month of the year. 

Today there is an unusually large amount of students in the class.

The ozone layer must be protected because it shields the Earth from excessive ultraviolet radiations

Patrick was very late getting home last night, and unfortunately, the dog barking woke everyone up

Before bridges were built, all transport across major rivers in the area were by ferryboat.

Choose the best option:

She is a famous ___. She tries her best to protect rare animals from extinction.

Ethics is the branch of philosophy that deals with the values of life in a coherent, systematic, and science manner.

In the nineteenth century, women used quilts to inscribe their responses to social, economic, and politics issues.

Nuclear energy, despite its early promise as a source of electrical power, is still insignificant in compared with older and safer energy sources.

The strength, size, and surefootedness of the Hama make its as excellentcy beast of burden in mountainous regions today as it was in the past

Disease is not as widespread than before because of better preventive medicine and vastly improved nutrition.

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

Vaslov Nijinsky achieved world recognition as both a dancer as well as a choreographer

You frequently see this kind of violence on .................. television. 

There is a widespread belief that the economical situation will improve.

Choose the correct answer to complete the sentence. "Planting trees can contribute to _____ global warming"

To survive , most birds must eat at least half their own weigh in food every day