Thismachineisveryeasy     .Anybodycanlearntouseitinafe...

问题详情：

 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

【回答】

D 

知识点：非谓语动词

题型：选择题