完形填空。 One of the most important ways to help plants and animals is to protect their habitats (栖息地). There they can live 1 too much interference (干涉) f rom humans. It is also important to 2 habitats outside reserves. You can visit a nearby national park or a(n) 3 reserve. Some national parks have 4 guided tours. Talk to the rangers (护林员) to find out whether animals are in er and 5 people protect them. For example, you and your friends 6 help the rangers with  their work. If you have friends on farms, 7 them to keep patches (小块地) of bush as wildlife habitats and to leave old trees standing, especially those with hollows (洞) suitable for nesting animals. Some groups 8 local lands and nature reserves. They do this by removing weeds and planting local native species in their places. You could join one of these groups, or 9 start a new one with your parents and your friends. Remove rubbish and replant trees; all these will also encourage native animals to 10 . (     )1. A. without (     )2. A. keep (     )3. A. ocean (     )4. A. special (     )5. A. when (     )6. A. would (     )7. A. make (     )8. A. look into (     )9. A. even (     )10. A. sleep B. with B. protect B. market B. boring B. how B. must B. ask B. throw out B. ever B. die C. for C. save C. nature C. traditional C. where C. have to C. stop C. throw away C. since C. return D. in D. leave D. country D. clean D. what D. can D. send D. look after D. already D. move