问题补充:
Believe it or not , that is people call the sixth sense.
A. when
B. which
C. why
D. what
答案:
A. when
B. which
C. why
(答案→)D. what
解析:考查表语从句。本句中的what引导的是一个表语从句,what在句中作为动词call的宾语。When和why在句中不能充当宾语,which是指特定范围之内的某一个,且含有疑问的语气。句意:信不信由你,那就是人们称为第六感的东西。故D正确。