He doesn’t lack to learn. You don’t have to tell or force him to do this or that. A. atte

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A. attempt
(答案→)B. motivation
C. conception
D. realization
解析：考察名词辨析。A尝试；B动机，动力；C概念，观念，想法；D认识，领会，实现；句意：他不缺少学习的动力，你不必告诉他或者强迫他做这做那。根据句意说明B正确。名词的词义辨析一定要注意一词多义的现象。