Identify the one underlined word A, B, C or D that must be changed for the sentence to be correct: 

At present, solar cells are too expensive and inefficient to use in the commercial generation of electricity

Identify the error in each sentence: (A) Although it would take a laboratory analysis (B) to determine the exact proportions of sand, silit, clay, and organic matter in your garden soil, you can get a good idea of what (C) it is by (D) feeling the soil’s texture.

Chọn đáp án đúng để hoàn thành câu:

The Old Man and the Sea is a novel of  just over 100 pages in length by Ernest Hemingway, ________.

His ............... of safety regulations really can’t be ignored any longer.

Mark the letter A, B, C or D to indicate the sentence that is closest in meaning to each of the following questions.

 I'm like my mum, whereas my brother looks like my dad.

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

Identify the error in each sentence: Drug addiction has resulted of many destroyed careers and expulsions from school or college

Choose the best answer among A, B, C or D that best completes each sentence: This is a magazine article on the ……   of space travel.

Many of the population in the rural areas is composed of manual workers.

Most presidential candidates have their names print on the ballot in the New Hampshire primary election because it is customarily the first one in the nation, and winning it can give a good chance to be nominated by their parties.

She has worked asasecretary                    she graduated fromcollege.

One of the most beautiful botanical gardens in the United States is the wildly and lovely Magnolia Gardens near Charleston, South Carolina.

By studying the fossils of pollen, which extremely resistant to decay, researchers can gain useful information about the vegetation of the past.

Of the four lectures, the second was by far the best, partly because t person who to delivered it had such a dynamic style.

Identify the error in each sentence: 

The effects of cigarette smoking has been proven to be extremely harmful.

The tongue is the principle organ of taste, and is crucial for chewing, swallowed and speaking.

Because of road works, traffic _______ to one lane in each direction.

The brothers Grimm intended their fairy tales to be studied by scholars of German history and not to enjoy as simple stories by children.

“_________________ ” _ “ I love it. It’s great, especially at night.”

My parents........they will move to the seaside when my father retires next year

It is estimated that at least a million meteors have hit the Earth’s land surface, which is only 25 percentage of the planet.