问题
选择题
she is not so healthy she used to be?
A．How it is that; as
B．Why is it that; as
C．Is it why; that
D．How is it that; what
答案
答案：B
题目分析：考查强调句型。It is ...that...是强调句型，强调句型有一般疑问和特殊疑问形式，特殊疑问形式是“特殊疑问词+is it ...that?”。句意：她为到底什么没有以前那么健康？强调句强调的是原因，not so/as...as不如......。故选B。