I. Choose the words whose underlined part is pronounced differently from that of the others in each group.

1. A. recycle                                  B. library                                        C. fly                                                 D. sky

2. A. post                                        B. hospital                                     C. plastic                                         D. newspaper

3. A. southest                               B. throw                                         C. another                                      D. bathroom

4. A. definitions                          B. environment                          C. preposition                             D. welcome

5. A. charity                                  B. program                                    C. trash                                           D. donation

6. A. around                                  B. about                                          C. country                                      D. found

7. A. plants                                    B. jars                                               C. gardens                                      D. throws

8. A. elephants                            B. protects                                     C. handbooks                               D. cleans

9. A. foxes                                      B. bottles                                       C. clothes                                       D. magazines

10. A. picked                               B. helped                                        C. created                                      D. laughed

II. Choose the word whose main stressed syllable is placed differently from that of the other in each group.

11. A. station                               B. bottle                                          C. reuse                                           D. donate

12. A. wildlife                              B. protect                                       C. purpose                                     D. useful

13. A. charity                               B. hospital                                     C. library                                        D. recycle

14. A. recycling                           B. container                                  C. newspaper                               D. direction

15. A. supermarket                   B. community                              C. environment                           D. imperative

 ( nhớ giải thích từng câu )