I feel it an honour to speak here.A. to askB. askingC. to be askedD. asked

问题补充：

I feel it an honour to speak here.

A. to ask

B. asking

C. to be asked

D. asked

答案：

A. to ask

B. asking

(答案→)C. to be asked

D. asked

解析：本题的含义是我感到能够被邀请在这儿说话是一种荣誉，本题中的it为形式宾语，真正的宾语位于句尾用动词不定式，表示被动的意思，故用to be asked，故本题选C。