Was it Expo that made Shanghai the focus of the world then?A. hostedB. to be hosted

问题补充：

．Was it Expo that made Shanghai the focus of the world then?

A. hosted

B. to be hosted

C. hosting

D. having hosted

答案：

A. hosted

B. to be hosted

(答案→)C. hosting

D. having hosted

解析：考察非谓语动词.句意:是举办世博会让上海在那时成为了世界的焦点吗?动名词作主语表示抽象的动作,故选C.