a chance we are bound to visit the Shanghai EXPO. A. To be givenB. GivenC. GivingD.

问题补充：

a chance, we are bound to visit the Shanghai EXPO.

A. To be given

B. Given

C. Giving

D. Having given

答案：

A. To be given

(答案→)B. Given

C. Giving

D. Having given

解析：考查非谓语动词。句意：给我们一个机会，我们一定要参观上海世博会。过去分词表示被动的动作，和句子主语是动宾关系，故选B。