to ，I，put ，the ，ball ，in，the ，box ，want

_________________________________________

About ________ percent of the earth's surface is covered with water

I’m ten years old and my sister is two years older than me，so she is t_____ years old。

()Whoisthe_____?Heismyuncle.

Thisbookisthelightestand______(thin)ofallthebooks.