This machine is very easy _______. Anybody can learn to use it in a few minutes. 
#90906
A
operating
B
to be operating
C
operated
D
to operate
推荐题目
 ____many times, he still didn’t understand it.
#92564
A
Having been told
B
Though to be told
C
Having told
D
He was told
.Not ______ beautiful, the building is ______ now.
#97021
A
looking, being built
B
looked, being built
C
being looked, building
D
looking, built