The boy asked his mother go out to play table tennis.
A. that he could
B. if he could
C. if could he
D. whether he can
网友回答
A. that he could
(答案→)B. if he could
C. if could he
D. whether he can
解析：考查宾语从句：句意：男孩问妈妈是否可以出去打乒乓球。因为是asked，所以排除A。由于宾语从句的语序是陈述句的语序，排除C，因为主句的时态是一般过去式，所以从句用could，选B。