Question

反义疑问 he's given an important report on the work of the government,____? A. hasn't he B.isn't he

Answer 1

选B。
he's given an important report on the work of the government是give him an important report on the work of the government的被动语态。he's =he is。on是“关于”的意思。
句意：有人给了他一份关于政府工作的重要报告。

如果把he's 看作he has，这个句子就是主动语态了。give的主动语态结构是give sb sth.或give sth. to sb。而题中只有give sth，却没有to sb。可见这里he's不是he has。