Find the mistakes and correct them : How many kite do you have? I have a kite. What is your mother doing? She is cook in the kitchen

Exercise 13 : Find the mistakes and correct them
A, How many kite do you have? I have a kite
B, What is your mother doing? She is cook in the kitchen.
C, Is toby playing the piano? Yes,she is
D, What is Peter and Đavi david doing? They are playing football
E, How many balls are there under the table? There are three ball