It is cruicial that the plan ( ) at once

来源：学生作业帮编辑：拍题作业网作业帮分类：英语作业时间：2024/04/28 19:53:03

It is cruicial that the plan ( ) at once
A ve worked out B.is worked out C work out Dto be worked out 说出理由

答案为A；
已知这里It 作形式主语,真正的主语为从句,the plan.
另外由选项我们可以知道,从句的意思是：这个计划（应该）马上被执行.
整个句子的意思是,这个计划须马上执行至关重要.
由此我们可以得知,整个句子是：It is cruicial that the plan （should）be worked out at once.
should 表虚拟语气,可以省略.故选A.
注：有很多此类句子,省略should的.
例如：It is the time you (should) go to bed.

It is cruicial that the plan ( ) at once it is advisable that the message___sent at once. 19.It is necessary that the problem ( ) at once. It is necessary that the problem be settled at once. It is required that the project should be finished at once it is necessary that the meeting begin at once.翻译并说明begin这个时 200分-Is it ____ that you _____ the city?-No.Once a year at l He suggested that the method is popularized at once.suggeste Once it is worked out,the plan must be carried out it is more often posterity that destorys the once approprita It is often thought that disabilities are____1_____.Once,the Everything____,the plan can be carried out at once