—Did you meet with the famous space hero Yang Liwei ?— I had come here earlier !A. If on

问题补充：

—Did you meet with the famous space hero , Yang Liwei ?

— I had come here earlier !

A. If only

B. If not

C. But for

D. For fear

答案：

(答案→)A. If only

B. If not

C. But for

D. For fear

解析：If only：要是……该多好啊，用以表示对现在或未来的愿望，结构为：If only+S+did/情态动词+v；亦可表示与过去事实相反的愿望，结构为If only+S+had done；我未见到航天英雄杨利伟，要是我早点来该多好啊！“未见到”是过去的事情。故选A。