(2013·龙岩一模)— so many countries, you must be able to speak several different languages.
—I wish I could, but English is the only one I can speak.
A. Visiting
B. To visit
C. To have visited
D. Having visited
网友回答
A. Visiting
B. To visit
C. To have visited
(答案→)D. Having visited
解析：选D 考查非谓语动词。分析句子结构可知，句中已有谓语动词，故空处应用非谓语动词形式；且visit与you之间是逻辑上的主动关系，故应用动词的ing形式。根据语境可知，空处的动作发生在谓语动词之前，故用动词的ing形式的完成式。