一个虚拟语气的句子
I maintain that it is imperative that some emphases should be laid on multiculture and several practical steps be taken.
这个句子自然吗?some emphases还是emphasis（单数）更好?and 后面可以省略should吗?
It is high time that中should不能省略。
It is imperative that中可以省略。
两个that会不会重复？我想省略第一个。