问题描述：
The boxes which are used to keep food are made of ( )instead of plastic
wood metal glass plastic wool silver gold paple
最好把这句话的意思告诉我
If the pencil are not of ( ),we'll save the trees.
不能重复哦
wood metal glass plastic wool silver gold paple
最好把这句话的意思告诉我
If the pencil are not of ( ),we'll save the trees.
不能重复哦
问题解答：
我来补答展开全文阅读