The father as well as his three children skating on the frozen river every Sunday aftern

问题补充：

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. are going

答案：

A. is going

B. go

(答案→)C. goes

D. are going

解析：当主语被as well as连接的时候，谓语和前面的主语一致，这句话就是和the father一致，用单数，几个选项A和C是单数，时间状语是every Sunday afternoon，用一般现在时，句意：每年冬天的星期天下午爸爸和三个孩子都去结冰的河上滑冰。选C。