more attention your dictation might have been done much better.A. To giveB. If givingC.

问题补充：

more attention, your dictation might have been done much better.

A. To give

B. If giving

C. Giving

D. Given

答案：

A. To give

B. If giving

C. Giving

(答案→)D. Given

解析：过去分词作条件状语，表示被动。