27．We can draw a conclusion from the third paragraph that ________．

　　A．most people sleep less than seven hours a day

　　B．sleep less may easily lead to some illnesses

　　C．one should sleep at least seven hours a day

　　D．sleep is the best way to treat illnesses

　　答案　B　[细节理解题。根据第三段内容可知，从这项研究中可以得出结论：睡眠少很容易导致疾病。]

　　28．How does the author express his idea?

　　A．By using the results of studies.B．By comparing some numbers.

　　C．By telling some interesting stories.D．By referring to some theories.

　　答案　A　[细节理解题。作者为了说明睡眠不足可导致感冒的风险，多次提到了研究的结果。故答案为A。]

　　.阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

　　Children need eye health and vision care during their developmental years and yet the majority of children starting school do not have the care they need.The Canadian Association of Optometrists (CAO) recently launched “Eye See...Eye Learn”，a program of __29__(aware) to educate parents about the important link between __30__ (learn) and good vision.The program，__31__ is popular with both children and their parents，encourages parents to take their children to an optometrist(验光师) __32__ an eye exam before they begin kindergarten.The program partners government，schools and local community groups made __33__ of parents，teachers and health professionals.

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