A:站着不动
B:轻轻伏在冰面上并向岸边挪动
C:赶快跑开远离脚下的冰
D:立即改为单足站立
在森林中设防火道的目的是 ( )
Sam: Come on, it's time for school.
Mike: What class do you have today?
Sam: I have math, music and PE. How about you?
Mike: I have English, art and music.
Sam: I like English. What about you?
Mike: I like music.
选择正确的答案填在括号里。