1. English is spoken all over the world.
2. St. Petersburg was founded in 1703.
3. This book had been written before the author became famous.
4. This room is usually cleaned by my brother.
5. This purse was left in the classroom yesterday.
6. By 4 o'clock Nick will have been tired of fishing.
1....wasn't I?
2....isn't it?
3....shouldn't they?
4....aren't they?
5....haven't you?
6...will they?
7...did he?
8...doesn't he?