问题
选择题
(2012·辽宁高考)This machine is very easy ________. Anybody can learn to use it in a few minutes.
A．operating
B．to be operating
C．operated
D．to operate
答案
答案：D
选D 考查非谓语动词。在句型“主语＋be＋adj.＋to do”中，常用不定式的主动形式表示被动含义，故选D。
