新世纪大学英语综合教程4答案U11. disaster 2. compelled 3. historical 4. disciplined 5. destruction 6. output 7. retreat 8. abandoned 9. trace 10. eternal 11. investment 12. transfer 13. justify 14. nonetheless 15. contributions 16. accelerate 17. Threaten1. show signs of 2. called upon 3. off limits 4. in fear of 5. slow down 6. cut down 7. from head to foot 8. come by 9. lost out 10. As yet 11. reside insmoke + fog; web + log; breakfast + lunch ;medical + care ;motor + hotel; net + citizen ;scie