Do you have any idea that makes The Voice of China so popular?
A. what is it
B. what it is
C. how it is
D. how is it
网友回答
A. what is it
B. what it is
C. how it is
D. how is it
解析：选B。考查名词性从句和强调句。句意: 你知道是什么让《中国好声音》如此受欢迎吗? 本句采用的是强调句型的特殊疑问句形式, 空格处的内容作idea的同位语, 所以要用陈述语序; makes缺主语, 因此用what。