"The key to______the medical problems is health care reform," said the minister.

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问题 "The key to______the medical problems is health care reform," said the minister.

选项 A、solve
B、solving
C、being solved
D、be solved

答案B

解析考查固定用法及动词语态。the key to doing sth．表示“做某事的关键”，句中to是介词，后面加动词的ing形式。句意为“部长说：‘解决医疗问题的关键是医疗改革’”。句子表达的“解决医疗问题”，是主动意义，故选B。

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