25．(2015·江苏高考)________ Li Bai, a great Chinese poet, was born is known to the public, but some won't accept it.
A．That B．Why
C．Where D．How
解析：选C 考查名词性从句。句意：中国的大诗人李白的出生地众所周知，但有些人还不认可。分析句子结构可知，a great Chinese poet是Li Bai的同位语，where Li Bai ... was born是主语从句，表示“李白出生的地方”。
21．(2015·江苏高考)The number of smokers, ________ is reported, has dropped by 17 percent in just one year.
A．it B．which
C．what D．as
解析：选D 考查定语从句。句意：正如所报道的，烟民的数量仅仅在一年内就下降了17%。as作为关系代词，引导非限制性定语从句，位置非常灵活，可位于主句前、主句后，也可位于主句中间。which引导非限制性定语从句时位于主句之后。
