选C. 如果选WHAT WHERE,WHAT WHERE会在从句(KNOW的宾语从句)里面里充当成分. 比如I want to know what it is.看从句what it is,其实what 在这里充当了it is的表语,指IT IS WHAT的这个东西.It is(an apple.) I want to know where Beijing is,这里where指代在哪个地方,比如it is (in China). 而你的问题,there is a hospital成分完整.所以IF