A. taboo B. introduction C. optimistic D. tea A. mark out B. ambassador C. vie D. score A. shyness B. uncrowded C. snowstorm D. sauce A. ton B. consist C. previous D. twin towers A. collar B. proud C. silt D. central A. be proud of B. speed C. twenty-one D. nationalism A. rush hour B. root C. from time to time D. fraction A. kindly B. take pride in C. software D. circuit A. New York B. fail C. up-to-date D. contention A. went B. live C. guard D. of one's own