4: An actual visit from a faraway friend is worth celebration. A: 错误 B: 正确 ...

11: () of danger, he jumped into the river all at once. A: Because B: In terms C: Instead D: Regardless ...

4. Which is not mentioned as the author’s feeling about the work of the volunteers? A. unimportant to the success of the Olympics B. unnecessary to the success of the Olympics C. irrelevant to the success of the Olympics D. invaluable...

8. What happened in the wake of Wilmut's announcement? A. Governments hurried to draft guidelines for a future filled with incredible possibilities. B. President Clinton ordered a national commission to study the legal and moral implicat...

4. Computers work according to () planted into them. A. genes B. cells C. programs D. plans ...

5. Why are trees so important in the ecosystem? A. They can decorate the environment. B. Trees are necessary to build topsoil. C. They can maintain rainfall in dry climates. D. They can purify underground water. ...

10. The human can react to any situation, some of which he may never have imagined. A. 错误 B. 正确 ...

3. According to Dr. McKinley, what is not the primary cause of the environmental problem? A. Deforesting and global warming. B. The abuse of natural resources. C. Air and water pollution. D. The attitude of human beings. ...

8: The synonyms to “powerful” are(). A: weak B: strong C: inert D: forceful ...

3. The United States and European countries have equal numbers of students from abroad. Foreigners don’t study in developing countries. A. 错误 B. 正确 ...