【題目】He has a heart trouble and the doctor finds it difficult ______.

A. treatingB. in treatingC. to treatD. for treating

【答案】C

【解析】

考查非謂語(yǔ)動(dòng)詞。句意：他有心臟病，醫(yī)生發(fā)現(xiàn)很難治療。根據(jù)固定結(jié)構(gòu)“find it+形容詞+to do sth.”表示“發(fā)現(xiàn)做某事……”，故選C。

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