The big problem was that we really did not understand what was happened

Dresses, skirts, shoes and children’s clothing are advertised at great reduced prices this week.

He was very surprised when he visited London, in that the drivers always drive on the left hand side of the street.

Because blood from different individuals may different in the type of antigen on the surface of the red cells and the type of antibody in the plasma, a dangerous reaction can occur between the donor and recipient in a blood transfusion.

The earth is the only planet with a large number of oxygen in its atmosphere.

For thousands of years, man has created sweet-smelling substances from wood, herbs and flowers and using them for perfumes or medicine.

Little have people done to alleviate the sea pollution caused by the factories in central Vietnam, haven’t they?

Has the government made a decide to ban the use of chemical weapon yet?

Ours brains are incredibly agile machines, and it's hard to think of anything they do more efficient than recognize face.

In spite of my father is old , he gets up early and does morning exercise.

Developing new technologies are time-consuming and expensive.

Dogs that are trained to lead the blind must be loyalty, intelligent and calm.

A smile can be observed, described, and reliably identify, it can also be elicited and manipulated under experimental conditions.

The most visible remind of the close relationship between the United States and France is the famous Statue of Liberty, which stands in New York habor.

The amount of women earning Master's Degrees has risen sharply in recent years.

Doctors believe there is better in this modern world of ours to try to prevent illnesses than to rely on medicines to cure them.

There are much kinds of books in my school library,but readers cannot borrow them.

My mother doesn’t care how much does the washing machine cost because she is going to buy it anyway.

She wishes that we didn’t send her the candy yesterday because she’s on a diet.

The workers are building a new bridge which is 150 meters in high.

Each of the nurses report to the operating room when his or her name is called.