He was generous with his time, _______

试题详情及答案解析

He was generous with his time, ________ I was grateful.

A．in which	B．on which
C．to which	D．for which

答案：D

试题分析：考查介词+which。句意：我很感激他花很多时间来帮助我。be grateful to sb for sth因某事感激某人，介词to后跟人；for后跟物，which指代主句，故选D。
考点：考查介词+which