题干
--- Do you know Amy came to school this morning?
--- Her bike was broken, so she had to walk.
A：why
B：how
C：when
D：where
答案(点此获取答案解析）
B
--- Do you know Amy came to school this morning?
--- Her bike was broken, so she had to walk.
A：why
B：how
C：when
D：where
