What could a chair say to deal with the situation when a speaker goes overtime in a speech? There are three proper expressions listed in the choices. Choose all of the correct answers.

A、Well,Dr.Li,I’mafraidtimeisup;wethankyouverymuchforyourenlighteningopinions.;
B、Sinceyouhavealreadyusedupouragreed-upontime,Ihavetoaskyoutostophere.;
C、Excuseme,sir,sincethetime’squitelimited,couldyoupleasestopthediscussion?;
D、Thatisallfortoday.OurnextmeetingwillbeonThursdaymorningatthesametimeandplace.