They in Nanjing since they came to China two years ago.A. livedB. have livedC. liveD. are

问题补充：

They in Nanjing since they came to China two years ago.

A. lived

B. have lived

C. live

D. are living

答案：

A. lived

(答案→)B. have lived

C. live

D. are living

解析：句意：自从他们两年前来到中国他们就住在南京。动作发生在过去，一直延续到现在或将来，用现在完成时。根据句意，故选B。