________ is well known to us all is ________ Yao Ming has become one of the most popular NBA players.
A.It; that B.As; that
C.What; what D.What; that
________ is well known to us all is ________ Yao Ming has become one of the most popular NBA players.
A.It; that B.As; that
C.What; what D.What; that
D
第一空what引导主语从句,第二空that引导表语从句。若选A则可以去掉第二个is,成为It is...that... 结构;若选B项则可以去掉第二个is和选项中的that,后再加一逗号,此时as引导非限制性定语从句。