6．__________　 7．__________　 8．__________　 9．__________　 10．__________

1．__________　 2．__________　 3．__________　 4．__________　 5．__________

10．He is my neighbor who lives u_______．But we are not familiar to each other， for he has never come down．

9．Li Hua fell off this bike this morning．Luckily，he didn’t hurt himself b__________．

8．You must put the piano there，with its back a_______ the wall．

7．Everyone should stop p______ the Bailang River，instead of putting waste into it．

6．The Chinese scientists did many scientific e______ before they sent the Chang’e-1(嫦娥一号) into space．

5．People learn languages to _________(沟通)with others．

4．The pandas live in the ______________(自然)reserve．

3．Planting trees can help to make our _________ (环境)clearer and more beautiful．