Every four years, athletes from all over the world 21______ in the Olympics. Each country sends teams of its finest athletes to 22______ in the games. At every Olympic game, old records for speed and distance are 23______ as throngs of spectators wat

Every four years, athletes from all over the world 21______ in the Olympics. Each country sends teams of its finest athletes to 22______ in the games. At every Olympic game, old records for speed and distance are 23______ as throngs of spectators watch 24______ amazement.
The Olympics take place in a different country each time they are held. Years before the start of a new Olympics, the host country starts getting 25______ for the games. A great deal of planning and money goes into building an Olympic Village, a city with buildings to house the teams. Stadium, tracks, pools gyms, rinks, and rings are all carefully 26______.
The Olympics open with a bright splash that is rarely seen these days. At first the leader of the host country is welcomed into the stadium by the head of the Olympic 27______. Then a fantastic march begins. As the bands play, the teams enter the stadium. Each team wears 28______ Olympic dress and marches behind its flag. The Greek team 29______ the march 30______ the first Olympic games which were held by the Greeks. The team of the host country marches last.
28.

A.customary

B.regular

C.official

D.formal

正确答案是C