D　[细节理解题。根据第一段中的"Charles did blood tests on many people...he could not leave Cambodia"可知，Charles发现柬埔寨人患有严重的贫血症，于是决定留下来帮他们解决这个问题。]

　　2．What was the problem with the iron bar for treating anaemia?

　　A．It could easily make food go bad.

　　B．People found other uses for it.

　　C．It didn't release enough iron.

　　D．People couldn't afford it.

　　B　[细节理解题。根据第二段中的"instead of cooking with it，people used it to hold down papers or support a table with a broken leg"可知，人们并没有将铁棒用来做饭，而是挪作他用。]

　　3．How did the local people feel about using the iron fish?

　　A．Pleased.　　 B．Bored.

　　C．Puzzled. D．Shocked.

　　A　[推理判断题。根据第三段中的"So people are willing to put the iron fish in their cooking pots."可知，当地村民愿意将铁鱼添加到做饭用的锅中以补充铁。由此可推测，他们很乐意使用铁鱼。]

　　4．What does Charles mean by his words in the last paragraph?

　　A．The iron fish can be used for treating anaemia worldwide.

　　B．A treatment does not work unless it is acceptable.

　　C．Fish is an important part of Cambodian culture.

　　D．Anaemia is not so serious as people think.

　　B　[推理判断题。根据最后一段中"Charles"说的"用什么样形状的铁来帮助人们治疗贫血症，关键要与当地的文化结合起来，因为只有人们愿意使用它，它才有用"可知B项正确。]

IV.完形填空