—I wonder why you didn’t take part in the speech contest yesterday afternoon—I'm terrib

问题补充：

—I wonder why you didn’t take part in the speech contest yesterday afternoon.

—Im terribly sorry, I myself.

A. am conducted

B. conducted

C. was conducting

D. would conduct

答案：

A. am conducted

B. conducted

(答案→)C. was conducting

D. would conduct

解析：考查时态。句意：--我想知道你为什么没参加昨天下午的演讲比赛。--非常抱歉，我（之前）表现不太好。conduct oneself表现，这里指截至说话时，过去表现的不好，用过去进行时，故选C。