I made my first trip to clean the forest that afternoon three years ago．I 　1 　(take)a big black rubbish bag with me．Ten minutes after 　2 　(start)to pick up litter，my bag 　3 　(fill)with cans，bottles，broken glass and newspapers．I　 　4 　(be)to the forest more than ten times to pick up litter ever since then．I like to be there and I 　5 　(feel)great to do something for the environment．I can’t understand why people drop litter．But I 　6 　(keep)picking up litter until they stop 　7 　(drop)it．What I 　8 　(do)now is only a small bit to help the earth，but i still think it 　　9 　(is)important．Let’s do things we should do 　10 　(protect)our environment at once！

10．How __________ (浪费的)it is to throw away the food！

9．Deaf people __________ (交流)by sign language．

8．Do you think you have the __________ (自由)to do what you like?

7．He pays a lot of __________ (注意) to the details．

6．I read several __________ (广告)in the newspaper just now．

5．Our teacher often e__________ us to believe ourselves．

4．The building is 274 meters in h__________．

3．Many wild animals have d__________ and we will never see them again．

2．We often visit our friends and r__________ during Spring Festivals．