参考答案：

C 1. [A] why [B] where [C] how [D] when

B 2. [A] In return [B] In particular [C] In contrast [D] In conclusion

D 3. [A] sufficient [B] famous [C] perfect [D] necessary

C 4. [A] individualism [B] modernism [C] optimism [D] realism

D 5. [A] echo [B] miss [C] spoil [D] change

B 6. [A] imagined [B] measured [C] invented [D] assumed

A 7. [A] Sure [B] Odd [C] Unfortunate [D] Often

D 8. [A] advertised [B] divided [C] overtaxed [D] headquartered

A 9. [A] explain [B] overstate [C] summarize [D] emphasize

B 10. [A] stages [B] factors [C] levels [D] methods

A 11. [A] desirable [B] sociable [C] reputable [D] reliable

C 12. [A] resumed [B] held [C]emerged [D] broke

A 13. [A] attribute [B] assign [C] transfer [D]compare

D 14. [A] serious [B] civilized [C] ambitious [D]experienced

A 15. [A] thus [B] instead [C] also [D] never

D 16. [A] rapidly [B] regularly [C] directly [D] equally

C 17. [A] After [B] Until [C] While [D] Since

C 18. [A] arrives [B] jumps [C] hints [D] strikes

A 19. [A] shape [B] rediscover [C] simplify [D] share

B 20. [A] pray for [B] lean towards [C] give away [D] send out