Ever since Ming furniture went on exhibit in Beijing there large crowds at the World Art

问题补充：

Ever since Ming furniture went on exhibit in Beijing, there large crowds at the World Art Museum every day.

A. was

B. have been

C. has been

Dwere

答案：

A. was

(答案→)B. have been

C. has been

D. were

解析：句意：自从明代家具在北京展览, 每天在世界艺术博物馆都有大量的人群。因为和Ever since Ming furniture went on exhibit in Beijing,连用，用现在完成时，表示动作从过去到现在一直进行，所以选B。