Exercise for unit 9答案单选答案：1-5 ABCAB 6-10 CABCA 11-15 ACCAC选填词组：in total 2. stuck to 3. feels like 4. will get married 5. cheer me up完型答案：1-5 CBCBC 6-10 BCABC判断正误：AABBA十二选十：leave 2. appear 3. researchers 4. erase 5. tested 6. has suggested 7. arguments 8. while 9. supporters 10. against对话答案：that /which 2. energy 3. though 4. relaxing 5. besides 6. suggests/shows 7. why 8. wonder 9. increase/improve 10. Cheaply表格答案：importance 2. fun/getting fun 3. truth/fact 4.supporting 5. not only but also 6. know the world 7. goes 8. possible 9. communicate with each other 10. share