at college for 3 years she knows the place very well.A. To have studiedB. Having studied

问题补充：

at college for 3 years, she knows the place very well.

A. To have studied

B. Having studied

C. Studying

D. Studied

答案：

A. To have studied

(答案→)B. Having studied

C. Studying

D. Studied

解析：考查非谓语动词。句意：在这所大学学习了三年，她非常了解这个地方。现在分词做状语表示主语正在进行的伴随性动作，和句子主语是逻辑上的主谓关系。如果分词动作发生在主句谓语动词之前，则要用完成时态的过去分词。故选B。