Unless we protect the environment, our life will be badly affected.

I had to do my homework. I could not help my mother with the washing-up.

The USA is a country of high youth unemployment.

Is it necessary to meet the manager at the airport?

No other city in Vietnam is so large as Ho Chi Minh City.

Mike graduated from The University of Melbourne with flying colours. However, he chose to work for volunteer programs in Africa.

 “I’ll speak calmly. I really will!”, he said.

It is rumored that the oil price is going to increase by 5 %.

He cannot practice scuba diving because he has a weak heart.

No matter how hard Fred tried to lose weight, he did not succeed.

 "Why don't we wear sunglasses?" our grandpa would say when we went out on bright sunny days.

We had better leave him a note because it is possible they will arrive late.

The demand was so great. They had to reprint the book immediately.

He expected us to offer him the job.

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

Had the advertisement for our product been better, more people would have bought it.

How do people learn languages?

It was so late that nothing could be done.

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

I did not read his book. I did not understand what the lecturer was saying.

It was an interesting novel. I stayed up all night to finish it.