2. 外语
  3. The opening ceremony is a great occasion. It is essential______for that.

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、that we are prepared
C、of us to be prepared
D、our being prepared
答案A
解析 主语从句用法题。题意：“开幕式是重要的场合，我们应该为此做好准备。”it在句中为形式主语，真正的主语既可由不定式引导，也可由从句引导，故D选项错误。另外，由不定式引导时，应使用for连接人称代词，故C错误。如果由that从句引导，通常从句要用动词原形，即that we be prepared。因此，正确答案是A。
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