( )1. A. strong ( )2. A. at ( )3. A. escape ( )4. A. the earth ( )5. A. may ( )6. A. Certain ( )7. A. improved ( )8. A. the earth's ( )9. A. stops ( )10.A. if | B. lively B. in B. run away B. human beings B. can B. Many B. changed B. the wild animal's B. attacks B. as | C. exciting C. on C. get off C. the animal world C. should C. Few C. happened to C. the weather's C. protects C. as if | D. enjoyable D .to D. disappear D. the environment D. will D. All D, took away D. man's D. describes D. when |