单选题 Was ______ Bill, ______ played basketball very well, ______ helped the blind man across the street?
   A) that; that; who                   B) it; that; that
   C) it; who; that                      D) this; who; who
【正确答案】 C
【答案解析】此句是强调句的一般疑问句式。第一个空为Bill的替代词it，第二个空为修饰限定Bill这个人，用who引导，第三个空为强调句的引导词that。