By the time our teacher arrives tomorrow, all the work ,with which he will be content.
A. is acplished
B. will have been acplished
C. will be acplished
D. has been acplished
网友回答
A. is acplished
(答案→)B. will have been acplished
C. will be acplished
D. has been acplished
解析：考查时态和语态。By与完成时连用，the time our teacher arrives tomorrow使用一般现在时代替将来时，故主句使用将来完成时，根据句意使用被动语态。句意：到明天老师到的时候，所有的工作都已经被完成了，对此他会很满意的。故B正确。