I regret _______ you that you did not pass the test. However, you should try     it again.

Bob sent a report to the Chairman instead _______ the meeting.

You _______ to do the homework or the teacher will punish you.

My little brother _______ Japanese and French though he is only ten years old.

John _______ lazy but he is certainly not stupid.

Yesterday evening the phone _______ three times while you _______ dinner out with your friends.

It _______ dry here at this time of the year. It _______ much.

He _______ this book for 3 months by the end of this week.

There was during the Industrial Revolution that the United States was able to increase productivity through mechanization.

Uranium, found in trace quantities, are an exceedingly rare and potentially dangerous element.

If you are not completely satisfied on our goods, contact us within ten days and we will arrange collection and refund your money in full.

With as few as 5,000 tigers remaining in the world today, time is running quick out for this powerful animal.

Since the world was industrialized, the number of animal species that has become extinct has increased.

Although they are an inexpensive supplier of vitamins, minerals, and high quality protein, eggs contain a high level of blood cholesterol, one of the major cause of heart disease.

From bones finding in the United States, we have learned that many animals which no longer existed in the world once made their homes there.

Operate the machine _______.

She was deeply sad after her husband’s death, but she behaved _______ she had been OK.

It was his mistake but he pretended _______ nothing wrong.

They worked _______ hard _______ they passed the exam at high grades.

He had _______ he went hiking.

She made _______ she failed the exam.

Keep your password secret _______ others cannot access your account.

Mary closed the door and the window _______ disturbed by the noise.

The thieves are running as fast as possible _______ caught by the police.

_______ thousands of accidents happen every day, many people seem not to observe the traffic laws.

Hard-working _______ he is, he will never be top of his class.

  _______ the same class with Paul for two years, I never knew him very well.

You need proper shoes to go hiking in the mountains _______ the ground is rough and hard.

Those children have stayed in the hospital for a long time _______

_______ past deforestation and illegal hunting, many species of mammals and flora have disappeared.

If you take the 8 a.m. flight to New York you _______ change the plane.

If the traffic _______ bad, I may get home late.

You will have to pay higher insurance _______ a sports car.

If we _______ the map, _______ lost now.

That washing machine is _______ but _______ in quality.

They are both pretty but Susan is the _______ of the two.

It seems that we have _______ for ourselves and our family.