_⑤Shelookedathimcoldlyandherwordssoundedsharp．_(_人__或__言__语_)_尖__锐__的__⑥Duringthelastthreedecades(十年),thenumberofpeoplejoininginphysicalfitnessprogramshasincreased__sh_a_r_p_ly__．⑦Themanwas_sh_a_r_p_e_ni_n_ghisknifewitha_s_ha_r_p_e_n_er_whenIenteredtheroom.4....