Passive voice. Пассивный (страдательный) залог

was explained to us at the English lesson.
The story was written by Chekhov.
Yesterday the sports centre was visited by lots of people.
This sports game is often played at P.E. lessons.
The ball was thrown over the fence.
The boxer was knocked down.
I was born in Moscow.
They will be trained by a famous coach.
I will be sent to the competition tomorrow.