5. D。细节理解题。第二段最后一句As far as I know, there just is nobody else for whom there is this sort of broadcast records可知只有女王的讲话录音完整，具有研究的价值。

4．A　　 细节理解题。从第六段最后一句话“…no wine, no tobacco and no anger”可知。

3．C　　 细节理解题。从第二段，尤其是最后一句话可知。

2. D　　 细节理解题。从第六段第二句话“…people will think I am getting old…”可知。

1. C　　 细节理解题。从第一段第二句话“…never found the time or money…”可知。

12. Which of the following would be the best title for the text?

A. Codeine: A New Medicine　　　　　 B. Chocolate May Cure Coughs

C. Cough Treatment: A Hard Case　　 D. Theobromine Can Cause Coughs

11. We learn from the text that volunteers in the experiment _____.

　A. were patients with bad coughs

　B. were divided into the three groups

　C. received standard treatments

　D. suffered little side effects

10. What was used in the experiment to cause coughing?

　　 A. Theobromine. 　　　　　　　　　　 B. Codeine.　 　　　　 C. Capsaicin.　 　　　　　　 D. Placebo.

9. According to Professor Barnes, theobromine ______.

A. cannot be as effective as codeine

B. can be harmful to people’s health

C. cannot be separated from chocolate

D. can be a more effective cure for coughs

8. What is the text mainly about?

A. The relationship between accents and social classes.

B. The Queen’s Christmas speeches on TV.

C. The changes in a person’s accent.

D. The recent development of the English language.

C

. Something in chocolate could be used to stop coughs and lead to more effective medicines, say UK researchers.

Their study found that theobromine, found in cocoa, was nearly a third more effective in stopping coughs than codeine, which was considered the best cough medicine at present.

The Imperial College London researchers who published their results online said the discovery could lead to more effective cough treatment. “While coughing is not necessarily harmful(有害的) it can have a major effect on the quality of life, and this discovery could be a huge step forward in treating this problem,” said Professor Peter Barnes.

Ten healthy volunteers(志愿者) were given theobromine, codeine or placebo, a pill that contains no medicine, during the experiment. Neither the volunteers nor the researchers knew who received which pill. The researchers then measured levels of capsaicin, which is used in research to cause coughing and as a sign of how well the medicine are stopping coughs.

The team found that, when the volunteers were given theobromine, the capsaicin need to produce a cough was around a third higher than in the placebo group. When they were given codeine they need only slightly higher levers of capsaicin to cause a cough compared with the placebo.

The researchers said that theobromine worked by keeping down a verve activity(神经活动), which cause coughing. They also found that unlike some standard cough treatments, theobromine caused no side effects such as sleepiness.