The boy with two dogs in the yard when the earthquake rocked the cityA. is playingB. was

问题补充：

The boy with two dogs in the yard when the earthquake rocked the city．

A. is playing

B. was playing

C. are playing

D. were playing

答案：

A. is playing

(答案→)B. was playing

C. are playing

D. were playing

解析： 根据时间状语从句可知主语为过去进行时态，主语为这个男孩，第三人称单数，故选B.