It is important that you turned off the heater every morning before you leave for class.

Little have people done to alleviate the sea pollution caused by the factories in central Vietnam, haven’t they?

Not everyone realizes that the most largest organ of the human body is the skin.

After the police had tried unsuccessfully to determine to who the car belonged, they towed it to the station.

After spending two days arguing about where to go for their holidays, is was decided that they shouldn’t go anywhere.

Many languages used around the world they do not have a form of writing.

Instead of calling off the meeting, maybe we can just put it over until next month.

My pen has very few ink in it, so could you give me some

Once you have finished an article and identified its main ideas, it may not be necessary to reread it again.

Education, whether it happens at school or anywhere else, is a important part in our life.

The chief of police demanded from his assistants an orderly investigation, a well-written report, and that they work hard.

The longer the children waited in the long queue, the more impatiently they became

The most sensitive way to resolve a family problem is by open discussion.

He passed the exams with high scores, that made his parents happy.

Ours brains are incredibly agile machines, and it's hard to think of anything they do more efficient than recognize face.

It is important that cancer is diagnosed and treated as early as possible in order to assure a successful cure.

Reading several books on that subject, Bill considered himself an expert.

If the goal keeper had playing better, they would not have lost the game.

My father asked me where had I gone the night before.

The student must have her assessment form fill in by the examiner during the oral exam.

Mai and Lan have a row because they have misunderstood one another.