The machine starts the second the button ___.A.will be pressed.B.was pressed.C.pre.The machine starts the second the button _________________________.A.will be pressed.B.was pressed.C.presses.D.is pressed.助人为快乐之本~

问题描述:

The machine starts the second the button ___.A.will be pressed.B.was pressed.C.pre
.The machine starts the second the button _________________________.
A.will be pressed.B.was pressed.C.presses.D.is pressed.
助人为快乐之本~

B
.The machine starts the second the button was pressed
的意思是:机器启动第二个按钮被按下
显然这句话是一个一般过去时的被动语态