Choose the correct option.
1. I always remember my ________ as a very happy period of my life.
a.childness
b.childhood
c.childish
d.childless
2. Its __________ to speak to him.He's very stubborn.
a. use
b. useful
c. useless
d. user
3. My brother is a very ________ child.He is full of energy.
a.live
b.living
c.lively
d.unlovin
4.Have you seen _________newspaper?
a.yesterdays'
b.yesterday's
c.yesterday
d.a yesterday