50．What plays the key role in curing cancer according to the passage?

　　A．The chemical—curcumin that can be found in the bright yellow curry spice turmeric

　　B．The doctors that have enough experience.

　　C．The family that has enough money.

　　D．The cancer cells that can digest themselves after the curcumin triggered lethal cell death signals

　　答案　A　[细节理解题。B、C在文章没有涉及，故排除；D项为姜黄素如何杀死癌细胞与问题不符，由第二段的关键词The chemical—curcumin—can可知答案。]

　　51．Dr Lesley Walker thought ________.

　　A．that natural chemicals found in turmeric could be used to treat any cancer.

　　B．this could be a new treatment for oesophageal cancer.

　　C．this could be widely used in treating oesophageal cancer.

　　D．there was the possibility forming the new way for treating oesophageal cancer.

　　答案　D　[细节推断题。由文章的第四段可知答案。]

　　E

　　A teacher of the old school

　　My grandfather was a teacher.He was the headmaster of a school for boys between the ages of thirteen and eighteen.I know that he was a kind and gentle man at heart，because when I was young (and he was old)，he gave me presents and seated me on his knees，and told me stories.But I believe the boys at his school were afraid of him.

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