题目内容
11．______ the Internet plays such an important role in our daily life？It's a long story．（ ）
| A． | Why it is | B． | Why is it | C． | Why is it that | D． | Why it is that |
分析 为什么因特网在我们的生活中发挥了重要的作用
解答 答案C．
强调句型的构成：it is/was+被强调部分+that/who+其他，当被强调部分是人的时候that、who均可使用，否则只能用that．判断强调句型的方法是去掉it is/was …that/who后句子仍然成立．此句是强调殊疑问句句型，结构如下：殊疑问词+is/was+it+that+句子，故选C．
点评 强调句的结构：
1．it is/was+强调部分+that+剩余句子部分
2．is/was it+强调部分+that+剩余句子部分？
3．what/when/which等特殊疑问词+is/was it+that+剩余句子部分？（疑问的是强调部分）
例如：Who was it that met his good friend last night on the street？
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