Cars cause pollution but people still want them.

He is an authority on primitive religion.

Overeating is a cause of several deadly diseases. Physical inactivity is another cause of several deadly diseases.

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

There were so many people on the train that Mary couldn’t get a seat.

Mr. Brown said to me "Make good use of your time. You wont get such an opportunity again."

“I didn’t take your money” he said to her.

We cut down many forests. The Earth becomes hot.

"It can't be Mike who leaked the document, it might be Tom" said our manager.

The boss was annoyed that his secretary came to work late.

There is no point in your phoning Jane – she’s away.

The basketball team knew they lost the match. They soon started to blame each other.

Although it rained heavily, they went on working.

The referee brought the football game to a halt. He blew his whistle.

"Getting a good job doesn't matter much to me"

Although his leg was hurt, he managed to drive a car.

We gain more knowledge about how to stay safe online. We worry about the threats of cybercrime less.

When there is so much traffic on the roads, it is sometimes quicker to walk than to go by car.

We don’t allow anyone to use their cell phones during the examination.

Mary is crazy about her new puppy.

Most scientists know him well. However, very few ordinary people have heard of him.