Внужную форму поставить ken spent the whole saturday playing his computer. now he was (quiet) sitting in the armchair and listening to the sounds from outside. he hoped to hear the car engine which would mean his family were home at last (alone) was not a nice feeling and ken was determined not to experience it again.

Ken spent the whole Saturday playing his computer. Now he was quietly sitting in the armchair and listening to the sounds from outside.
He hoped to hear the car engine which would mean his family were home at last loneliness was not a nice feeling and Ken was determined not to experience it again.