Change the following sentences into Passive.
1.The Dutch grow many tulips and other flowers.
2.Different countries hold a parade on Victory Day.
3.Americans wrote their Constitution in 1786.
4. Our class usually gives flowers to veterans on Victory day.
5.This famous director makes many films about the Great Patriotic War.

1 Many tulips  and other flowers are grown by the Dutch.2 A parade is held by many countries on Victory Day. 3 The United States Constitution was written (by Americans) in 1786.4 On Victory Day flowers are usually given to veterans by our class.5 Many films about the Great Patriotic War are made by the famous director.