Express the same idea using passive constructions.
1. He'll read an interesting story to them.
2. Mother promised her a trip to Moscow.
3. They'll send a lot of letters to Misha.
4. We always buy bread for her.
5. They sold these trainers very cheaply.

1. An interesting story will be read to them by him. 2. She was promised a trip to Moscow by her mother. ИЛИ A trip to Moscow was promised to her by her mother. 3. A lot of letters will be sent to Misha by them. 4. Bread is always bought for her by us. 5. These trainers were sold very cheaply by them.