The father as well as his three children skating on the frozen river every Sunday afternoon in winter.
A. is going
B. go
C. goes
D. aregoing
网友回答
A. is going
B. go
C. goes
D. aregoing
解析：下划线处与单数形式的主语the father搭配，不受as well as his three children的影响，因此应排除选项B、D。根据状语“every Sunday afternoon in winter”提供的，下划线处应该用一般现在时表示与现在相关的经常性活动，因此应进一步排除A而选出C。