[单选题]His health is ______.

A
as poor if not poor than his sister
B
poor as his sister’s if not poor
C
as poor as if not poorer than his sister’s
D
as poor if not poorer than sister’s
正确答案:C
题目解析
省略句。其完整形式为:“If his health is not poorer than his sister's,his health is as poor as his sister's.”其中有些部分相同,故省略。
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