Fill in the Blanks Shaw's ParadoxesOnline version Fill in the gaps with suitable words. by Irina Gavrilova 1 like pessimist human birds fish playing like optimist get stop problem beings old get illusion aeroplane parachute grow 1 . Both optimists and pessimists contribute to society . The invents the , the the . 2 . We don't stop playing because we ; we grow old because we . 3 . Take care to what you or you will be forced to what you . 4 . Now that we have learned to fly the air like , swim under water like , we lack one thing ? to learn to live on earth as . 5 . The single biggest in communication is the that it has taken place .