3. __________ the opening and reform policy, our country is becoming stronger and stronger.

4. The death of his pet dog __________ his feelings.

5. Many kinds of animals are __________ of extinct, such as the Siberian Tiger and the antelope.

6. The bird was caught in the cage __________ for freedom.

7. Persons who are easy __________ are normally have an gentle temper.

8. After years of hard work, the number of pandas has __________ about 1,590.

答案：

一、1. A number of brave people gave their lives to save the villagers in the flood. 2. This film is worth watching a second time. 3. Since you have been working hard, you needn't be concerned about the result of the exam. 4. As we all know, pandas feed on bamboo. 5. At present, we must focus our attention on the protection of the antelopes.

二、1. that 2. where 3. which / that 4. as 5. where 6. why 7. whose 8. when; who 9. whom 10. when

三、1. on the increase 2. stand for 3. Thanks to 4. had / has a great effect on 5. in danger 6. struggling 7. to work with 8. increased to