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
网友回答
(答案→)A. that
B. why
C. how
D. whether
解析：
这题考查that引导同位语从句，修饰possibility，句意是：一些人担心手机有可能会导致一系列疾病，皮疹和脑肿瘤。选A。