the doctors really doubt is my mother will recover from the serious disease soon.
A. What; when
B. That; how
C. What; whether
D. That; what
网友回答
A. What; when
B. That; how
(答案→)C. What; whether
D. That; what
解析：考查主语从句和表语从句，what引导主语从句，从句中缺少宾语，第二空考查表语从句的连接词，句意：医生真正怀疑的是，是否我妈妈会从重病从恢复。所以用whether引导定语从句，选C。