is known to us all Yao Ming is an iconic( 偶像的) figure of Chinese basketball .A. WhatB. A

问题补充：

is known to us all, Yao Ming is an iconic( 偶像的) figure of Chinese basketball .

A. What

B. As

C. It

D. which

答案：

A. What

(答案→)B. As

C. It

D. which

解析：考查定语从句。As引导非限定性定语从句，as为“正如”之意。句意：正如我们所知道的，姚明是中国篮球偶像人物。