--- lovely dress! ---It by my sister.
A. How; makes
B. How a; made
C. What a; was made
D. What; is making
网友回答
A. How; makes
B. How a; made
(答案→)C. What a; was made
D. What; is making
解析：感叹句主要有what和how构成：
1、what修饰名词或名词短语，有以下两种形式： 1. What+a(an)+（形容词）+单数可数名词+主语+谓语！或是：What+名词词组+主语+谓语！ 2. What+(形容词）+可数名词复数或不可数名词+主语+谓语！
2、How引导的感叹句。 how用来修饰形容词、副词或动词。其结构是：How+形容词（副词）+主语+谓语！
根据下文lovely dress!dress是可数名词单数，故用what a。下文，它是我的姐姐做的。结合语境可知下文主语是动作对象，故用被动语态。选C。