1)Dave all the Harry Potter books. read
has read
2)I a flat with my friends if I with my parents.
would rent; didn’t live
rented; lived
3)If I for longer, I more energy.
slept; would have
sleeped; had
4)I fitter if I more sport.
were; would do
would be; did
5)Rewrite the sentences in the passive.

People often give leather items as a third wedding anniversary present.
Leather items…..

will be given as a third wedding anniversary present
are often given as a third wedding anniversary present