Shanghaiisoneofthebiggest_____intheworld. A: city B: cities C: countries

Intheworld,socceroffootballisthemostpopularsport.ThisisbecausemanycountrieshavewonderfulteamsfortheWorldCup.TheWorldCupisheldeveryfouryears. A: a B: b C: c D: d

Intheworld,thereareover2000varietiesofsnakes,_____areharmlesstohumans. A: mostlythey B: mostofthem C: mostofwhich D: whichmost