lt is a hard and small thing.you can use it to open the door or the box.lt is a_______.补充
问题描述：
lt is a hard and small thing.you can use it to open the door or the box.lt is a_______.
补充
答
lt is a hard and small thing.you can use it to open the door or the box.lt is a__key_____.
答
key
答
key,意思是：它是一个坚硬的并且小的东西,你可以用它打开门或者箱子,所以它应该是钥匙,key,