THEY/ PLAY/ TENNIS/ 9.30 / YESTERDAY MORNING.HEADACHE IS VERY COMMO...

2, - DE KIEM TRA GIAI DOAN 3
DE KIEM TRA GIAI DOAN 3
2, They/ play/ tennis/ 9.30 / yesterday morning.Headache is very common disease in the USA. Every year, about fifty millions -> _______________________________________________________people have to go to the doctor because of headache. The symptoms of the