It is essential that human____ ways and means to protect the

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It is essential that human____ ways and means to protect the environment.
A.adopt B.have adopted C.will adopt D.will have adopted

选A.
It is +essential等形容词后,that主语从句中用虚拟形式should do sth(should可以省略),这类形容词包括necessary,important,essential,imperative,urgent,preferable,vital,advisable等,例如It is necessary that you listen to the teacher carefully.或者It is essential that you be able to pronounce every single word correctly.

It is essential that human____ ways and means to protect the It is essential that the program _________ into the computer It is essential that everyone ___ what to do. 翻译It is one of their ways to show that they grow up and they Read the following ways to protect y______ 英语翻译It’s one of their ways to show that they grow up and the It is our desire that every effort _______ to protect the su 英语翻译Some people believe that it is important to protect the it means that we should go to bed early and get up early the （it ）means that it is going to sonwtomorrow 对么? It is urgent that immediate measures _____ to protect person 改错The ways and means are proved of great use to us in our