It is important that the environment (protect) ______.

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问题 It is important that the environment (protect) ______.

选项

答案(should)be protected

解析在“It is/was important that．．．”这样的句型中，important后面的主语从句要使用“(should)=+动词原形”形式的虚拟语气,should常常可以省略。类似的形容词还有necessary,essential,critical等。

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大学英语三级B级

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