Whatever they end up doing, they themselves a great deal.
A. will be teaching
B. will have taught
C. are teaching
D. will be taught
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(答案→)A. will be teaching
B. will have taught
C. are teaching
D. will be taught
解析：综合考查时态。句意“不管他们以做什么事情来作为结束，他们都从中学到很多东西。”teach oneself是固定短语，“自学......”，是主动语态，排除D。以Whatever开头的分句表示的是将来，故用将来时，排除C。在整个过程中都在学习，故用进行时。故选A。