Whatever he does, once he sets up a goal, he would start pursuing it without .
A. hesitation
B. suggestion
C. discussion
D. decision
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(答案→)A. hesitation
B. suggestion
C. discussion
D. decision
解析：词义辨析。A.犹豫 B. 建议C. 讨论 D. 决定。无论他想做什么，一旦他确立目标，他就会 毫不犹豫的从事它。选A。