C. why singing and speaking voices are different

　　D. why singing uses more spaces above the vocal folds

　　8. The main purpose of the text is to ________.

　　A. encourage people to learn singing

　　B. introduce a scientific study of sound

　　C. tell the difference between accents

　　D. teach people how to use the structures of the body correctly

　　答案：【语篇解读】　本文是应用文。文章主要介绍了人们说话与唱歌的声音为何不同。6. B　解析：推理判断题。根据第二段中的he uses a bunch of different structures inside his body: his lungs, the muscles around his lungs , his larynx(voice box), his vocal folds, and the spaces above his vocal folds可知。7. C　解析：段落大意题。根据第三段中的首句及One reason和Another reason可知。8. B　解析：写作目的题。本文主要介绍了一个科学原理，故选B项。C

　　(2017·福州高中毕业班质量检测)Any day we wish; we can discipline ourselves to change it all. Any day we wish; we can open the book that will open our mind to new knowledge. Any day we wish; we can start a new activity. Any day we wish; we can start the process of life change. We can do it immediately, or next week, or next month, or next year.

　　We can also do nothing. We can pretend rather than perform. And if the idea of having to change ourselves makes us uncomfortable, we can remain as we are. We can choose rest over labor, entertainment over education, delusion(幻想) over truth, and doubt over confidence. The choices are ours to make. But while we complain about the effect, we continue to nourish(助长) the cause.As Shakespeare uniquely observed, “The fault is not in the stars, but in ourselves.” We created our circumstances by our past choices. We have both the ability and the responsibility to make better choices beginning today.

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