Those beautiful dresses are made of silk and cotton are from Zhejiang改错
问题描述：
Those beautiful dresses are made of silk and cotton are from Zhejiang
改错
答
第一个are改成which
答
第一个are前加which
Those beautiful dresses which are made of silk and cotton are from Zhejiang.
或者
去掉第一个are
Those beautiful dresses made of silk and cotton are from Zhejiang.