To their disappointment，Dr Wang gave a speech about the economy without even a passing________to the problem of unemployment.
A．connection B．appointment
C．reference D．exploration
To their disappointment，Dr Wang gave a speech about the economy without even a passing________to the problem of unemployment.
A．connection B．appointment
C．reference D．exploration
解析： 考查名词。句意为：令他们失望的是，王教授只是做了一个关于经济方面的演讲，根本都没有提及失业方面的问题。C项“参考，提及”，符合句意。A项意为“联系，连接”；B项意为“任命，约会”；D项意为“探索，考察”。
答案： C