1. The dolphins can learn to follow men's d_________.
2. Dolphins can jump 20 feet a_________ the water.
 3. Polar bears are very s_________.
4. Mary's favorite animal is the g_________ panda.
5. Pandas look like they are w_________ glasses.
6. A panda is a g_________ animal, and children around the world.
7. Pandas lives on b_________, China is the home of all pandas in the world.
8. We should p_________ pandas and other animals.
9. I like pet dog very much. Its hair is very s_________.
10. An elephant has a s_________ long nose.

1. Zhijin Cave is known as the most beautiful underground  _______ (宫殿) in the world.  
2. Susan usually has  some pieces of b_______  and a bottle of milk for breakfast.       
3. In English the first name is the g_______   name.                                     
4. Spring is the best time for p_______  trees.                                          
5. — Excuse me. Are you f_______  now?                                                  
   — Sorry, I'm very busy.                                                              
6. It's ten  _______  (分钟) walk.                                                   
7. He  _______  (使用) a lift to go up and down every day.                            
8. Food must be  _______  (保存) in cool places in summer.                        
9. We often listen to our teacher _______  (认真) in class.                          
10. With the d_______  of computer science, more and more work will be done by computer.