1. He is so devoted to his research that it never occurs to him that he will soon have to retire.

2. Many people have observed that without effective checks, we all have a tendency to abuse our power.

3. Some countries refuse to get involved in this dispute and they resent any foreign interference.

4. The control of sandstorms will involve a tremendous amount of work and money.

5. You have to take the local conditions into consideration when you apply these technologies.

6. All applicants will have to fill out these forms and mail in an application fee of 50 dollars.

7. Based on his careful observation of children’s behavior, he came to the conclusion that learning is a natural pleasure.

8. In a country of many nationalities, ethnic harmony requires very careful handling.

9. The government is determined to punish all the corrupt officials involved.

10. Cheating at/on exams does not occur very often. But when it does, the school takes a very tough position.

LESSON 4

1. Only in this way can we give a reasonable account of his strange behavior.

2. She claims to possess a magic power—the power to cure disease simply by the touch of her hand.

3. He appointed five people to handle the case. They formed a strong team. Within days they found in his possession rolls of euros, US dollars and large quantities of valuables the source of which the suspect could not account for.

4. In the story, the evil spirit often appears in the form of a pretty young lady.

5. He rolled up the painting, and said that he would not part with it for less than a million dollars.

6. Of all the qualified judges, I don’t know why she was appointed to the Supreme Court.

7. I don’t know enough to form an elaborate theory, but I’m sure that poverty alone cannot account for the increase of the crime rate.

8. A big stone suddenly rolled down the hill, so big that it smashed the truck to pieces.

9. I said we must roll up our sleeves and start working, but he just rolled his eyes philosophically and smiled.

10. In ancient times, our philosophers believed that a good king should be to the people as a good father is to his children—he must never treat them cruelly on any account.