A.Write the plural possessive form of each noun for the first three questions .

1. friend

2. box

3. house

B.Rewrite the possessive noun where necessary for numbers 4 and 5 . If the noun is already correct, write correct !

4. Many people were astonished by (scientists’) discoveries in the twentieth century.

5. Alternative energy sources had to be developed to satisfy (peoples’) need for electrical power.