问题补充:
she is not so cheerful she used to be?
A. How is it that; as
B. Why is it that; what
C. Is it why; that
D. How it is what; as
答案:
(答案→)A. How is it that; as
B. Why is it that; what
C. Is it why; that
D. How it is what; as
解析:解析:句意:她怎么不像过去那样高兴了呢?强调句的特殊疑问句式:特殊疑问词+is/was it that+原句剩余部分。D项中的what不正确,故选A。