My elder sisters, both of them were doctors, said they were too busy to pick me up.

Not one in one hundred children exposed to the disease are likely to develop symptoms of it.

Reading several books on that subject, Bill considered himself an expert.

You shouldn’t criticize him in front of his friends. It was insensitive of you.

I think she will be suitable for the work because she has been working like a teacher for a long time.

My father asked me where had I gone the night before.

To reduce pollution, we have to stop using many things that makes our life comfortable.

People in every part of the world readily and easily communicates by means of electronic mail.

This might not matter with you, but some people are going to be negatively affected by this decision.

Once you have finished an article and identified its main ideas, it may not be necessary to reread it again.

Higher education in the United States specifically refers to post -secondary institutions, that offer associate degrees, master degrees or Ph.d. degrees or equivalents.

We had better to review this lesson carefully because we will have some questions on it.

Bill is often late for class, which makes his teachers angrily.

If I had enough money, I would have travelled around the world.

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.

Students suppose to read all the questions carefully and find out the answers to them.

Slowly and with care, the museum director removed the Ming vase from the shelf and placed it on the display pedestal.

A motion picture provides us with both entertainment but also knowledge.

She has disappeared three days ago, and they are still looking for her now.

The assumption that smoking has bad effects on our health have been proved.

The developing of the submarine was hindered by the lack of a power source that could propel an underwater vessel.