______ how much you practice the speech, the actual presentation

______ how much you practice the speech, the actual presentation will be different from your plan.
A、Aware of
B、Convinced of
C、Clear of
D、Regardless of
【正确答案】：D
【题目解析】：aware of意为意识到...，convinced of意为确信、相信...，clear of意为对...很清楚、很明白，regardless of意为不管……。根据题意：不管（无论）你练习多少次这个演讲，实际的情况和你的计划会有所不同。因此D项符合。答案为D。