外研版高中英语选修十一模块4练习卷

There is no greater pleasure than lying on my back in the middle of the grassland, _____at the night sky.
A.to stare    B. staring    C. stared    D, having stared

--Mum, have you seen my U-Disk?
--____________ you bought last Sunday? I'm afraid I haven't seen ________.

Ballet is amazing;      you go ,you are likely to find yourself going again and again.

—Oh,dear! We only have 15 minutes to get to the station!
—So terrible! There isn’t any taxi around when you want     .

      the weather, the sports meet will be held on time.

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.
According to Professor Barnes, theobromine ______.

What was used in the experiment to cause coughing?

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

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

根据下面图画中的信息，写一篇你对使用一次性木筷的看法的英语短文。
词数：100左右。
参考词汇：一次性木筷 disposable chopsiticks