The front road was washed away, so we __
题型：选择题
问题：
The front road was washed away, so we _____ get off the bus and walk over. [ ]
A. must
B. had to
C. should
D. need
The front road was washed away, so we _____ get off the bus and walk over. [ ]
A. must
B. had to
C. should
D. need