问题补充：
she is not so healthyshe used to be?
A. How is it that ; as
B. Why is it that; what
C. Is it why ; that
D. How it is that ;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 that ;as
解析：本题考查强调句型的特殊疑问句及so…as结构。强调结构的特殊疑问句:疑问词+is/was it that+其余成分?;同级比较的否定式有两种: not as…as和not so…as…。
