问题
选择题
(2012·南京高二检测) Some people are worrying about the possibility _______ mobile phones could be responsible for a range of illnesses, from rashes (皮疹) to brain tumors.
A．that
B．why
C．how
D．whether
答案
答案：A
A 本题考查同位语从句。that是对名词possibility的内容的解释。句意：一些人担心手机可能会引起很多的病，像皮疹和脑瘤。