THEY ARE STILL PLAYING TENNIS AFTER THREE HOURS.A. THEY HAVE BEEN...

36. - DE KIEM TRA 1 TIET LAN 1
DE KIEM TRA 1 TIET LAN 1
36. They are still playing tennis after three hours.A. They have been playing tennis for three hours.B. They had been playing tennis for three hours.C. They had played tennis for three hours.D. They have played tennis for three hours.