Помоги с 4 упражнением пожалуйста

The animals were very hungry and thirsty. A thirsty hippo walked to the bank of the river day after day,week after week but the hot sun burned it because it didn't rain. The giraffe was very hungry. There were a lot of leaves but they were brown and dry. The zebra was hungry too. The grass was dry and there was a little grass. There were a few clouds in the sky. Why didn't it rain? The elephant looked in the sky and the rain started. The animals were very happy because there was a rainbow