The machine _____, the next step was how to operate it.

admin2013-07-24  61

问题 The machine _____, the next step was how to operate it.

选项 A、having been installed
B、had been installed
C、having being installed
D、has been installed

答案A

解析
转载请注明原文地址:https://kaotiyun.com/show/75fK777K
0

随机试题
最新回复(0)