Most of the villagers took part in the Dragon Boat races 9：00a．m． the morning of June 7．（ ）
A．at． inB．on．onC．on ，inD．at ，on
Most of the villagers took part in the Dragon Boat races 9：00a．m． the morning of June 7．（ ）
A．at． inB．on．onC．on ，inD．at ，on
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