In some species of fish, such the three-spined stickleback, the male, not the female, performs the task of caring for the young.

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

Many heavy work that was once done by hand can now be done more easily with the help of compressed air

Both Mr. and Mrs. Smith are explaining the children the rules of the game .

When her son, Nick fell and injured his knee, she refused to pay for a doctor and spent hours looking up free medical help.

As soon as they arrived at the hotel they took the elevator to their room and straight to bed because they were so tired.

Mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase: 
During the last 400 years, most scientists have ________on mathematics in their development of their inventions or discoveries.

You should bring an umbrella_______ it rains.

It is their nearly perfect crystal structure that gives diamonds their hardness, brilliance, and transparent.

All of the students_______ the seniors will receive their grades in two weeks.

I think that when you meet the person that you want spend the rest of your life with, you change.

Many bridges in New England were covered with wooden roofs to protect it from rain and snow.

The accounting supervisor was unpleased to learn that the budget report would not be finished by time

Choose the word or phrase that can substitute for the underlined word:

I bought the ring as a memento of Greek.

The attribution of human characteristics to animals or inanimate objects appears in the mythologies of many cultures is a literacy device called anthropomorphism

Mercury is not often visible because it is so near the sun to be seen.

This new nice flat looks perfect for a young couple.

Rattan, a close relative of bamboo, is often used to make tables, chairs, and other furnitures .

Take a map with you _______ you lose your way.

The medical science began with the Greek Hippocrates, who earned for himself the title of father of Medicine

It is large island, few people live there, though