In about , experimental psychologists have devoted more research to learning than to any other topic

My brother together with his friends often _    swimming at the weekend.

Deep cratered, the moon is over 2100 miles in diameter with negligible gravity and atmosphere

Yogurt contains a higher percentage of lactic acid than another fermented milks, and it is rich in B-complex vitamins.

Choose one word or phrase marked A, B, C, or D that best complete the preceding sentence:

I haven't seen Tom__________ he gave me this book.

The three largest state is, and has been since Alaska’s admission into the Union, California.

The wooden fence surrounded the factory is beginning to fall down because of the rain.

Before we returned from swimming in the river near the camp, someone had stole our clothes, and had to walk back with our towels around us.

Choose the best answer:

The most important historical relics found in Hanoi's Temple of Literature ________ the Stelae of Doctors.

The world would look eerie different if human eyes were sensitive to infrared radiation.

Thanks to his obstinacy, he achieved what he wanted. If he were discouraged earlier by this failures, he would not have reached his aims.

The amount of books in the Library of Congress is more than 58 million volumes.

Men are traditional decision-makers _________ bread-winners.

An octopus has three hearts to pump blood throughout their body.

Some studies show that young babies prefer the smell of milk to those of other liquids.

It’s time you went home, but I’d rather you stay here.

Choose the best answer:

The film was quite. All the children are __________ in the film.

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

Mark the letter A, B, C, or D on your answer sheet to indicate the best answer in each of the following questions:

Were you able to find the person __________ wallet you found?

Usually the climate in mountainous areas becomes much windy at higher altitudes.

Choose the best answer A, B, C or D for the sentence: " Someone had _______ left a window open."