Look! 　　　　playful the boy is! He is jumping up and down with excitement.

---__________ weather it is! We can’t go boating on the Xuanwu Lake.---Don’t worry. Let’s go to the Science Museum instead.

   exciting sport it is to climb the mountains！

—_________ terrible news ! Heavy snow and serious earthquake !—Yeah，__________ I hope to fly there and help them．

         difficult questions the teacher is asking! Only a few students can answer them!