Express the same idea using passive constructions. 1. he will read an interesting story to them. 2. mother promised her a trip to moscow. 3. they will send a lot of letters to misha. 4. we always buy bread for her. 5. they sold these trainers very cheaply. 6. they always insist on this idea, but we don't agree with it.

1. An interesting story will be read to them (by him). 
2. A trip to Moscow  was promised her (by  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).
6. This idea is always insisted on (by them), but we don't agree with it.