---There a concert this evening.---Yes.Exciting news.A. are going to beB. is going to beC.

问题补充：

---There a concert this evening.

---Yes.Exciting news.

A. are going to be

B. is going to be

C. is going to have

D. will have

答案：

A. are going to be

(答案→)B. is going to be

C. is going to have

D. will have

解析：句意：——今天晚上将有一场音乐会吗？——是的，令人激动的消息。have表示拥有；there be表示客观事物的存在，“有”，谓语动词用就近原则。因为主语是a concert单数形式，故选B。