问题
选择题
Many years have been spent by him how to solve the question.
A．to learning
B．with learning
C．learning
D．on learning
答案
C
题目分析：句意：他用了许多年的时间来学习如何解决这个问题。句型：sb. spend（s） some time/some money (in) doing sth.,本句用的是被动语态，故选C。
考点: 考查动词句型的用法。