单选题 The engineer tried to ______ the problem with several drawings.
【正确答案】 C
【答案解析】[解析] 句意:工程师试图用几个图示来阐明这一问题。词义辨析。recognize:认出,识别,承认;impress:给予某人深刻印象;illustrate:阐明,举例说明;identify:确认,识别。根据句意,选C。