ex2
1 αt -> in
2 hαve -> hαs
3 for -> to
4 both tom αnd tim....
5  hαirs -> hαir

ex2 there is one mistake
we no wear a uniform at out school
how many childs does your sister have?
i am going to the post ofice for buy some stamps
tim and tom both are having blond hair and blue eyes
linh is chinese she has drank brow hairs

ex1
Let's go to the zoo.
How about going on foot?
He wants to be a doctor.
Why don't we go to the cinema?
ex2
There is one mistake.
We no wear a uniform at out school.
How many childs does your sister have?
I am going to the post ofice for buy some stamps.
Tim and Tom both are having blond hair and blue eyes.
Line is Chinese.She has drank brown hairs.

Ex1
let's go to the zoo
how about going on foot?
he wants to be a docter
why don't we go to the cinema?

Ex2
1.no --->don't
2.childs--->children
3.for--->to
4.both---> Both Tim and Tom.
5.She is Chinese.She has dark brown hairs