问题
选择题
(2013·福建南平二检)—Does he work hard at his lessons?
—Yes, he ________ no effort, as far as I know.
A．wastes
B．shares
C．spares
D．makes
答案
答案：C
选C 考查动词辨析。句意：“他学习努力吗？”“是的，据我所知，他不遗余力地学习。”spare no effort (to do sth.)“不遗余力(做某事)”，是固定短语。