图的顺序放乱了，我给句子和图排排队。
（ ） （ ）
1 3 4 2
It ______ unusual courage and determination to make the break with his family. [ ]
A. took
B. needed
C. spent.
D. shared
垂直接地线的长度通常为（）。
A.1～2m
B.2～3m
C.3～4m
D.4～5m
