quEstions 21—23 ArE BAsED on thE tAlk ABout olympiC gAmEs. you now hAvE 15 sEConDs to rEAD quEstions 21—23. thE First olympiC gAmEs took plACE ______.A．in thE sEvEnth CEnturyA、D、
B．CErtAinly BEForE 700B、
C、
C、ovEr thrEE thousAnD yEArs Ago
D．A thousAnD yEArs Ago