1. When we came to the seashore, the ship had been lost sight of.
2. In our country children are taken care of.
3. A new Metro line is being constructed now. One of its station (has been built) in our street.
4. I am sure this event will be commented upon in newspapers.
5. Little children are always looked after.
6. His suggestions are never objected to.
7. These lines of poetry are often refered to.