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The president is committed to _______ th...

The president is committed to _______ the existing system of medical care.

A.reform B.reforming C.have reformed D.having reformed

 

B 【解析】 考查非谓语动词。句意:总统致力于改革现有的医疗保健系统。be committed to doing表示“致力于”,非谓语动词表示的动作与主句谓语表示的动作同时进行,没有明显的先后顺序,所以用动名词的一般式作宾语,故B项正确。  
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