英语谜语（打一物品,可用中文回答）
问题描述：
英语谜语（打一物品,可用中文回答）
I am a small house,but I have no house,no sofas,no tables
I am a small house,but nobody lives in
In the early morning I open the door,four wheels are coming out
In the late afternoon I open the door again,the four wheels are coming back.
What am I?
答
车库