Nelson Mandela spent his time _______ in prison thinking about how to continue his fight for the black people’s freedom.A.lockingB.to lockC.being lockedD.locked
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D解析本题考查非谓语动词的用法。句意为：纳尔孙·曼德拉在监狱中还花时间考虑怎样继续为黑人自由而斗争。注意：题中的spend some time (in) doing sth.结构中，doing其实是题中的thinking。locked其实是过去分词作伴随状语，和spend的用法无关。