What the doctor is uncertain about is ______ my mother will

一道英语单选题!what the doctor really doubt is （ ）my mother will re It is uncertain __side effect the medicine will bring about, It is uncertain side effect the medicine will bring about,al It is uncertain ______ side effect the medicine will bring a [D19] It is uncertain ______ side effect the medicine will b It is uncertain what side effect the medicine will bring abo My mother is ______ _________ the phone it is uncertain ( ) side effect the medicine will bring abou It's uncertain ______ the experiment is worth doing. My mother is often ______(worry)about me my mother is a doctor.划线问,划 a doctor. 英语翻译Takaful is based on the idea that what is uncertain with