People think that traffic congestion in the downtown area is due to the increasing number of private cars.

I’m sorry I interrupted your speech in the middle.

Soil erosion is a result of forests being cut down carelessly.

They/ not answer/ phone/ this morning/ so/ must/ out/.

He did not work hard. He failed the exam.

have/at the station/her/we/just met

Now people believe that lifelong learning is the key to success. Today’s labour market is competitive and demanding.

The boy became so confused and worried that he left home.

We started out for California. It started to rain right after that.

I whispered as I didn't want anybody to hear our conversation.

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

He is very intelligent. He can solve all the problems in no time.

Ann paints landscape pictures. She finds it very pleasant.

“Cigarette?”, he asked. “No, thanks.” I said

I last saw Bob when I was in Ho Chi Minh City.

Darwin/ who/ be/ famous/ English/ scientist/ develop/ theory/ evolution/.

My mother is very busy at work but she takes good care of her children.

Joe does a lot of exercise. He's still very fat.

I hardly know the truth about Jean’s success in the institute.

Nobody told me that George was ill.

“Go on Jack, apply for the job” said Mary.