For thousands of years, man has created sweet-smelling substances from wood, herbs and flowers and using them for perfumes or medicine.

The developing of the submarine was hindered by the lack of a power source that could propel an underwater vessel.

If I could speak two languages last years, I would have got a good job.

Mercury and alcohol are widely used in thermometers because their volume increases uniform with temperature.

I can’t find the letter I received from my boss some days ago. I might throw it into the waste paper bin yesterday.

Parks which are found in downtown areas where office workers and store employees can enjoy their lunch hours sitting on the green grass in clean, fresh air.

By the time the police come the robber had run away.

Each of the members of the group were made to write a report every week.

The assumption that smoking has bad effects on our health have been proved.

I’m not used to go to school late. I prefer punctuation.

Because they had spent too many time considering the new contract, the students lost the chance to lease the apartment.

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

I think she will be suitable for the work because she has been working like a teacher for a long time.

A dangerously situation was created by the bad roads.

Sometimes it takes me about three hours finishing my round.

It is recommended that people to take regular exercise.

Little he knows about the surprise that awaited him.

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

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

The guide told the tourists that it was a good restaurant specializing in seafood just round the corner from the museum.

On the wedding day, the groom's family and relatives go to the bride’s house bring gifts wrapped in red papers.