1.Someone made the piano in Germany.2.We keep the milk in the refrigerator.
问题描述：
1.Someone made the piano in Germany.2.We keep the milk in the refrigerator.
3.John visits London every six months.4.My mother bought the guitar twenty-five years ago.5.Someone damaged the piano recently.6.They broke some of the keys.改被动语态
答
The piano was made in Germany.The milk is kept in the refrigerator.London is visited by John every six months.The guitar was bought by my mother twenty-five years ago.The piano was damaged by someone ...