The coffee was not strong. It didn’t keep us awake.

We spend about one-third of our lives sleeping. We know relatively little about our sleep.

The best way to make them work hard is to promise them reward.

They are going to hold next year's congress in San Francisco.

They were exposed to biased information, so they didn't know the true story.

No matter how hard Fred tried to start the car, he didn’t succeed.

When the birth rate is high, the expectation of life is low.

He was successful in his career thanks to his parents' support.

He is an authority on primitive religion.

It’s difficult for me to understand what he implies.

The boy was too fat to run far.

He is an authority on primitive religion.

“You have just got a promotion, haven’t you? Congratulations!” Peter said to his friend.

You’d better take the keys. It’s possible I’ll come home late.

They were exposed to biased information, so they didn’t know the true story.

The young girl has great experience of nursing. She has worked as a hospital volunteer for years.

Sue is too slow to understand what you might say.

Nobody told me that George was ill.

The government have established some wildlife reserves. They want to protect endangered species.

People have discovered a new source of energy.

You cannot completely avoid stress in your life. You need to find ways to cope with it.