THE WORLD CUP TAKES PLACE ... FOUR YEARS IN DIFFERENT COUNTRIES....

999. - 1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN
1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN

999. The World Cup takes place ... four years in different countries.

A. each

B. every

C. by

D. for