It was not when he talked to her that he knew the truth.

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

Neither his parents nor his teacher are satisfied with his result when he was at school.

The amount of women earning Master's Degrees has risen sharply in recent years.

Dinosaurs became extinct millions of years ago because of the earth's climate changed drastically. 

There is a severe famine in Somalia, and thousands of people are dying from hunger.

When many of my friends take a shower in the morning, I usually take one before bed.

People are not allowed enter the park after midnight because of lack of security

When mining for gold, you must first obtain the gold ore and then apart the gold from the ore. 

I was amazed that Smith showed so few grief at his mother’s death.

Although Nam worked very hard, but he didn’t pass the final exam.

How much times did Rich and Jennifer have to do the experiment?

It is interesting to compare the early stylized art forms of ancient civilizations to the modern abstract forms of art.

If you need to keep fit, then why not take on a sport such as badminton or tennis?

Working provide people with personal satisfaction as well as money.

He has made a lot of mistakes in his writing because his carelessness.