问题
选择题
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
搜题请搜索小程序“爱下问搜题”
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：D