سؤال قراءة ستيب محلول — الإشارة والمرجعية (تدريب 8117)

(2) Fish can live in almost any conditions of water. They can live in the freezing waters of Antarctica, hot jungle streams, lakes and fast flowing mountain rivers. Nearly all fish get their oxygen from water. Although we cannot see it, water does contain oxygen. To get this oxygen, the fish forces water through its gills. The gills absorb oxygen and release carbon dioxide into the water which then passes out through the gills.