The young soldier really doesn't know __
问题:
The young soldier really doesn't know _______ to stop the baby from crying hard. [ ]
A. what to do
B. how to do
C. when to do
D. where to do
The young soldier really doesn't know _______ to stop the baby from crying hard. [ ]
A. what to do
B. how to do
C. when to do
D. where to do