Do you know what those bottles _____用be made of/from的正确形式填空
问题描述：
Do you know what those bottles _____用be made of/from的正确形式填空
答
are made of
答
are made of
区别在于be made of，如This bottle is made of glass.是看得出原材料的。
be made from则看不出原材料，如Paper is made from wood.
通常只要记住这个基本区别，有时也会有特例，在此不详述。
答
be made from 是化学变化
be made of 是物理变化
所以选择from,因为问题是说瓶子是有什么做成的.
答
made of