A. marble B. air-resistance C. hip D. Be careful A. just right B. Singapore C. blackboard D. smoking A. bulletin B. security C. New York D. keep away A. cold B. in the afternoon C. convention D. tyre A. windy B. give a helping hand C. tram D. out of work A. London B. attendant C. nearly D. latest A. dentist B. eve C. weather D. be ready for A. a lot of B. acquire C. love D. dropped A. in rags B. a lot C. world D. hotline A. as B. ear C. email D. Sydney