－Last month Shirley advised her father to buy her brother MP4 as a birthday present.
－ useful advice it was!
A. a; How
B. an; What a
C. an; What
D. /; How an
网友回答
A. a; How
B. an; What a
(答案→)C. an; What
D. /; How an
解析：MP4的第一因素是元音音素故用不定冠词an. 以what引导的感叹句的基本句型结构为what a/an +adj+可数名词单数+主语+谓语！；what+adj+可数名词的复数/不可数名词+主语+谓语！以how引导的感叹句的基本句型结构为how+adj/adv+主语+谓语！