He hadn't seen his mother for a longtime
问题:
He hadn't seen his mother for a long time, so when he saw his mother he ____ crying. [ ]
A. burst into
B. burst out
C. broke out
D. broke down
He hadn't seen his mother for a long time, so when he saw his mother he ____ crying. [ ]
A. burst into
B. burst out
C. broke out
D. broke down