WHY DID BILL LAUGH AND SHOUT

9. - DE THI HOC SINH GIOI MON TIENG ANH LOP 8 PHONG GDDT THANH PHO THAI BINH NAM HOC 2016 2017 CO DAP AN
Tiếng Anh DE THI HOC SINH GIOI MON TIENG ANH LOP 8 PHONG GDDT THANH PHO THAI BINH NAM HOC 2016 2017 CO DAP AN

9. Why did Bill laugh and shout?