選A.
It is +essential等形容詞后,that主語(yǔ)從句中用虛擬形式should do sth(should可以省略),這類形容詞包括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 environment.
It is essential that human____ ways and means to protect the environment.
A.adopt B.have adopted C.will adopt D.will have adopted
A.adopt B.have adopted C.will adopt D.will have adopted
英語(yǔ)人氣：286 ℃時(shí)間：2019-11-01 07:19:32
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