這道題的正確答案是：
I think this box is made of (paper或wood).
翻譯為：我認為這個箱子是用紙（或木頭）做成的.
be made of 能看到原材料
be make from 看到不到原材料
這里用的是is made of,也就是說組成這個箱子的材料是能看到原材料的
所以填寫paper或wood.
Everything there is made of bamboo.
那里所有的東西都是竹子做的.
The bed is made of wood.
床是木頭做成的.
如果用is made from,就代表看不到原材料
給你一些例句：
The clothes are made from cotton.
這些衣服是棉花做成的.
The paper is made from wood.
紙是木頭做成的.