I’m so tired; I’m finding it difficult in keeping my mind on my work.

Not until recent has interest in synthetic fuels been revived.

From now on, we’re going to study really hardly and make sure we will pass the exams.

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

The better you are at English, more chances you have to get a job at international organizations.

Sharks can detect minute electrical discharges coming from its preys.

All root vegetables grow underground, and not all vegetables that grow underground are roots.

We had planned to go to the movies, but, because of the amount of work I had, I spent the evening to study

In a medical study of nearly 5.000 adults, half of them were given one aspirin a day and the other half given a placebo, it was found that those taking Aspirin suffered 38 percent fewer heart attacks than those who weren’t 

The world’s rain forests are being cut down at the rate on 3000 acres per hour

I work in a large office with about thirty other people, most of whom I know quite well enough

We are not allowed to enter this construction site. A block of flats is being built here and it is dangerous to walk because you may get hurt by a fallen brick or some other objects.

The way a child plays with other children reveals a lot about the child’s emotional development

Composer John Cage, used many unusual objects as instrument in his music, including cowbells, flower pots, tin cans, and saw blades.

Often a headache is caused by the contraction of one of the muscle group that cover the skull, thus causing spasm and pain.

Some birds can travel at speeds approaching one hundred miles an hour, and a few land animals can so.

As the numeral of older people increases, services for the elderly will soon represent one of the fastest-growing areas of employment.

Early balloonists remained aloft in the air for relatively short periods

Find the word which has different sound in the part underlined

The most common form of treatment it is mass inoculation and chlorination of water sources.

Mobility is one of the characteristics often demanded of executives, and they must accustom themselves to move quite regularly