. The Shanghai World Expo is well worth .A. visitB. visitedC. to visitD. visiting

问题补充：

. The Shanghai World Expo is well worth .

A. visit

B. visited

C. to visit

D. visiting

答案：

A. visit

B. visited

C. to visit

(答案→)D. visiting

解析：可联系答.案.网客服索取。