B   Read and write读一读,写一写　(教材第8~9页)

Spring is coming!The sky is clearer and the sun is brighter.Can you think of any other changes?Look and tick.

Wu Binbin and his family are going on a trip to the countryside.Wu Binbin has a story to tell Robin.

Little Duck is watching the sun go down.It is getting lower and lower,but his shadow is getting longer and longer.

“Why is that?”Little Duck asks his friend Old Tree.“You are older and smarter than me.Tell me—why is my shadow longer when the sun gets lower?”

Old Tree says,“That’s easy,Little Duck.The sun goes down every day,and we grow older every day.Your shadow grows longer because you are growing taller.You are becoming a big beautiful bird!”

Wu Binbin:Can you answer Little Duck’s question,Robin?