It is cruicial that the plan ( ) at onceA ve worked out B.is worked out C work out Dto be worked out 说出理由
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Itiscruicialthattheplan()atonceAveworkedoutB.isworkedoutCworkoutDtobeworkedout说出理由Itiscruicialthatth
It is cruicial that the plan ( ) at onceA ve worked out B.is worked out C work out Dto be worked out 说出理由
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
It is cruicial that the plan ( ) at onceA 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.
B
that 后为子句
It is cruicial that the plan ( ) at onceA ve worked out B.is worked out C work out Dto be worked out 说出理由
it is strange that
英语翻译it is( )( )that
It is believe that
It is said that.
It is that all?
it is imperative that?
Is it that bad?
it is discovered that
that it is!和that's it!
that it is!和that's it!
it is ordered that,it is proposed
that is all,that is it ,that is right 区别?
It is amazing that 还是It is amazed that
That is how it gose,
it is high time that .
is that it 是什么句式
it is obvious that 造句