问题详情：
Raymond entered college at the age of eighteen, ________ four years later at the head of his class.
A．graduating B．graduated
C．to graduate D．having graduated
【回答】
A 考查现在分词的用法。从时间状语four years later可以看出，这是过去的一个动作，所以这里相当于and graduated…，因此用现在分词作结果状语。
知识点：非谓语动词
题型：选择题
