My box isnt (heavy)as your.These exercises are (easy) than in the

My box isnt (heavy)as your.
These exercises are (easy) than in the book.
Which house is (high) in your street?
To fly is (quick) than to go by car.
Whose child is (old) than my?
This example is (simple) of all.
He isn't so (stupid) as your brother is.
Which country is (beautiful)?
My (old) sister is two years (old) than I.
She is (attentive) child in her class.