今天我们要学习的短句是：

What's the occasion today?

I'm just curious as to why you didn't tell her the truth.

89: What's the occasion today? 今天是什么大日子？

这是经常能用到的一句英文。回答比较简单，可以用省略句来回答。

比如可以直接说：Peter's eightieth birthday! 前面的It is被省略了。

现在来学习一下句中的关键词：

occasion: 特殊场合；重大活动；盛会

例如：

Sara's party was quite an occasion - there were over a hundred people there.

萨拉的聚会真是一次盛会——有一百多人参加。

关于occasion，有几个常见搭配需要熟练掌握：

-on special occasions 在特殊的场合

-on the occasion of 值此...之际

-on occasion 有时；偶尔，间或

90: I'm just curious as to why you didn't tell her the truth. 我只是好奇你为什么不告诉她实情。

这是一句很棒的英文，其中有好几个值得学习的要素。

-be curious about 对...好奇

例如：

Babies are curious about everything around them.

婴儿对周围的一切都很好奇。

-as to 关于，至于（相当于about，例句中用的是be curious as to其实就等同于be curious about）

例如：

He was uncertain as to which road to take.

他拿不准该走哪条路。

-tell her the truth 告诉她实情

这里大家需要注意另外一个地道习语：

to tell (you) the truth 说句老实话，说实话

这里的意思相当于：to be honest

例如：

To tell (you) the truth, I didn't understand a word of what he was saying.

说实话，他说的我一点儿也听不懂。

总结一下：

-What's the occasion today? 今天是什么大日子？

-be curious as to/about 对...好奇

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