问题描述：
Do you know on which _______ to go down if there is a fire?A.ladder B.stair B.hose B.reel
Do you know on which _______ to go down if there is a fire?
A.ladder B.stair B.hose B.reel
Do you know on which _______ to go down if there is a fire?
A.ladder B.stair C.hose D.reel
Do you know on which _______ to go down if there is a fire?
A.ladder B.stair B.hose B.reel
Do you know on which _______ to go down if there is a fire?
A.ladder B.stair C.hose D.reel
问题解答：
我来补答展开全文阅读