20.It is important that we ________ the task ahead of time.

问题描述:

20.It is important that we ________ the task ahead of time.
A) will fish B) finished C) finish D) shall finish
不可以选D

选C,译为“我们提前完成了任务,这事很重要“ (已做完)
如果用D的形式的话,那也应该是should finish,虚拟语气,表建议,命令,要求.译为“我们必须要提前完成任务,这个很重要“ (还没完成)