49. Which of the following is true about the research under discussion?

4. Race remains a prominent and ______ issue in the United States, which has struggled to overcome a legacy of slavery and discrimination.

7.The educational expert’s speech ________ a new round of consultation from parents about children’s domestic education.

39.

3.We work to make money, but it’s a ________ that people who work hard and long often do not make the most money.

11. ________ on the cyberspace issue in a speech at a welcoming dinner in Seattle, Xi Jinping called on all countries to cooperate and draw up Internet policies corresponding with their national conditions.

24.

19. So large is the Pacific, _____ 30% of the earth’s surface, that the energy generated by its warming is enough to touch off a series of weather changes.

20. The Copenhagen conference is looking to agree on a(n) ________ that will be built on the current Kyoto Protocol.

9.Physicians need ________ expertise in pain and symptom management and skills in communication to meet the many needs of this population.

29.

10. Don’t let such a ______ matter as this come between us so that we can concentrate on the major issue.