The opening ceremony is a great occasion. It is essential________for that.

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问题 The opening ceremony is a great occasion. It is essential________for that.

选项 A、for us to be prepared
B、of us to be prepared
C、that we are prepared
D、our being prepared

答案A

解析 本题考查特殊句型。It is+adj. +for sb. to do sth. 表示做某事对某人来说很怎么样,句中的形容词用来修饰不定式。本题中给出的essential是修饰不定式to be prepared的,故A项为答案。It is+adj. +of sb. to do sth. 表示某人这么做真是太怎么样了,句中的形容词是用来形容人的,而本题形容词是修饰动作的,B项错误,故排除。essential用于It is essential that…结构时,that从句需要用虚拟语气,谓语通常用“should+动词原形”,故排除C项。essential不引导动名词复合结构,故排除D项。
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