问题补充:
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:
A. operating
B. to be operating
C. operated
(答案→)D. to operate
解析:考查非谓语动词的区别。一些表示状态性质的形容词比如:easy;hard;comfortable等用来作表语时,sth作为主语,形容词后面接动词不定式,该不定式动词如果是及物动词与句子主语构成动宾关系;例如:My homework is easy to finish. 如果形容词后面接的动词不定式的动词是vi,则动词后面带介词后仍然跟句子主语之间构成动宾关系;例如; The room is comfortable to live in. 句意:这台机器很容易操作。任何人都可以在几分钟内学习使用它。故D 正确。