Some people are worrying about the possibility mobile phones could be responsibl

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

试题答案

A

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。