问题补充：
different life today is from it was fifty years ago.
A. What a; what
B. What a; how
C. How; what
D. What; what
答案：
A. What a; what
B. What a; how
(答案→)C. How; what
D. What; what
解析：句意：今天的生活与30年前的生活多么不一样啊！这里是感叹句，被感叹的词是形容词different，所以用how感叹；What+a/an+名词单数＋主语＋谓语；What+(名词复数/不可数）＋主语＋谓语；How+形容词/副词＋主语＋谓语；这里是how+形容词+主语+谓语，故选C。
