MayIhaveyourattentio的精选

问题详情：请你根据某学校的一个广播通知，填写下面的海报。MayIhaveyourattention，please?Ihaveanannouncementtomake．Sincetheresourceissopreciousthateveryoneshouldtrytosaveitallthetime．OurschoolhasinvitedanexpertM...