Mary was badly ill,otherwise,she our celebration yesterdayA.\x05would have attended B must have taken part in C could join in D would attend

Mary was badly ill,otherwise,she our celebration yesterdayA.\x05would have attended B must have taken part in C could join in D would attend
Mary was badly ill,otherwise,she our celebration yesterday
A.\x05would have attended B must have taken part in C could join in D would attend

Mary was badly ill,otherwise,she our celebration yesterdayA.\x05would have attended B must have taken part in C could join in D would attend
A对过去的虚拟从句要用情态动词加过去完成时
可以肯定,

应该是A。这道题考的是虚拟语气。