It is essential that all the exam papers_back before the end of the term.A.must be sent B.are sent C.will be sent D.be s
It is essential that all the exam papers_back before the end of the term.A.must be sent B.are sent C.will be sent D.be sent 请给出英语解题详情.
英语人气：151 ℃时间：2019-08-21 19:24:08
优质解答
首先,这个句子是一个主语从句,it是形式主语,that后面从句是真正主语.在it is adj. that…这种结构中,当形容词是下列词时,that后面的句子谓语动词用虚拟语气：should+动词原型,should可以省略.这样的形容词：appropri...因此，这里只能是should be sent，should被省略，选择D虚拟语气不可以用must+be吗？嗯，在这种结构里面没有must+动词原型这种用法。在其他类型的一些虚拟语气中，可能会有might+动词原型或者might have done，must不用于虚拟语气。
我来回答
类似推荐
- 单选题：It was essential that the application forms ___ back before the deadline.
- It is essential that these application forms ___back as early as possible.
- It is essential that these application forms ________ back as early as possible.A.must be sent B.
- the opening ceremony is a great occasion.it is essential _______for that.
- 8.It was essential that the application forms ____ back before the deadline(截止日期).
猜你喜欢
- 1用that或who将两个句子合并为定语从句 1.She is the girl.I want to meet her.
- 2有三块合金,其中有两块质量相等,这两块合金中金与铜的质量比分别是3比5和2比7
- 3给一个杯子倒满开水,为什么杯子底部的水温比杯子顶部的水温先冷却?
- 4小花的妈妈用五分之二十四元钱买了三分之四千克的白菜,每千克白菜多少元?
- 5this is__movie I saw last week Isn't it__educational one
- 6用"小鸟""森林""人类"组成一段完整,通顺,有意义的话（50字左右）
- 7氧化铜和硫酸反应会变成硫酸铜和水么?
- 8英语介绍自己家乡天气的作文.（不少于50个单词)
- 9如果一盏25瓦的灯泡40小时用电一度,那么25000000盏25瓦的灯节约多少度电.
- 10请问初中化学常见的化合价及其对应的离子(团)有哪些?