问题:
The little girl crossed a large area of grassland into the woods _________ she realized that she was lost.
A.when
B.as
C.after
D.before
The little girl crossed a large area of grassland into the woods _________ she realized that she was lost.
A.when
B.as
C.after
D.before
A.when
B.as
C.after
D.before
参考答案: