问题
Her little son fell off the boat into the water due to her carelessness. The mother couldn’t help _____because she couldn’t help _____ her son out of the danger. [ ]
A: crying; to save
B: crying; saving
C: to cry; to save
D: cry; saving
B: crying; saving
C: to cry; to save
D: cry; saving
正确答案是：
