a) Are you cooking meal now? (Present Continuous)
b) My brother doesn't play computer games. (Present Simple)
c) Look! The baby is sleeping. (Present Continuous) He always sleeps after dinner. (Present Simple)
d) He is not watching TV now, he is reading a book. (Present Continuous)
a) Are you cooking
b) doesn't play
c) is sleeping, sleeps
d) isn't watching, is reading