16.Read the text and fill in the blanks : Zoos can help us to learn more about our world. People go to zoos to see the animals, birds and fish (1)______________come from different parts of the world. Zoos weren't always very good places for animals (2)___________ they sometimes had to live in small cages. Now (3)____________ cities in the world have a big zoo. They sometimes have long grass where animals (4)__________giraffes, lions and tigers can run and play. In (5)__________ zoos, there are often rivers for the crocodiles to swim in. The animals think they are in the jungle - not a zoo ! Fill in the blank (1): who when which where 17.Fill in the blank (2): than because instead but 18.Fill in the blank (3): no both any most 19.Fill in the blank (4): about of with like 20.Fill in the blank (5):Immersive Reader these that this every