To my surprise I hurried to the lecture hall only that the lecture had been cancelled.

问题补充：

To my surprise, I hurried to the lecture hall only that the lecture had been cancelled.

A. to be informed

B. being informed

C. to inform

D. informing

答案：

(答案→)A. to be informed

B. being informed

C. to inform

D. informing

解析：句意：使我惊讶的是，我匆忙来到会议大厅结果只是被通知讲座被取消了。这里用only to do表示出乎意料的结果，而且I和inform是被动关系，所以选A。