Yang Jiechi stated firmly that the Diaoyu islands had belonged to China from ancient times

问题补充：

Yang Jiechi stated firmly that the Diaoyu islands had belonged to China from ancient times and in 1895 after Japan defeated the Qing Dynasty in a war.

A. seized

B. were seized

C. have been seized

D. had seized

答案：

A. seized

(答案→)B. were seized

C. have been seized

D. had seized

解析：考查时态，and连接两个并列结构，前面是一般过去式，所以后面也是一般过去式，因为是被占领，所以用被动语态，所以选B