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It was unwise of him to ________ the unreliable data in his speech.
A、add to
B、refer to
C、belong to
D、point to
【正确答案】：B
【题目解析】：短语辨析。 B．涉及；参考；A．加入 ;  C．属于; D．指向。句意：在他的演讲中涉及不可靠的数据，是不明智的。故选B。