急急急，英语高手请进

1.我昨天买的随身听坏了。
The walkman which I bought yesterday is broken down.(注意，这里不能用broken，因为broken是形容已经碎了，拆开了才坏的，而要用broken down形容机器不能正常使用)

2.上个月建成的大厦是用来做餐厅的。
The building that was built last month is used as a restaurant.

The music player I bought yesterday is broken.
The building ,which was built last month , is of restaurant's use.

The walkman which I bought yesterday is broken.

The building which was built last month is going to be a canteen.

1.The walkman I bought yesterday is broken.
2.The building which was built last month is used as a restaurant.