August 8 was declared as National Fitness Day, when various events to encourage people to take more physical exercise.
A. held
B. were held
C. had held
D. have been held
网友回答
A. held
(答案→)B. were held
C. had held
D. have been held
解析：考察时态和语态。根据第一句中的was，说明这是一个一般过去时；句意：8月8日被宣布是全国健康日，在那时各种活动都被举行来鼓励人们参加更多的身体锻炼。根据句意说明使用被动语态的形式。故B正确。