. He is rather difficult to makefriends with, but his friendship, ____, ismore true than anyother.
A．once gained
B．when to gain
C．after is gained
D．while gaining
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◎ 解析
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◎ 知识点
根据n多题专家分析，试题“. He is rather difficult to makefriends with, but his friendship, ____, ismore true than anyother. A．once gainedB．when to gainC．after is gainedD．while gaining…”主要考查了你对 【现在分词的被动式】，【现在分词】，【不定式的被动式】，【过去分词】 等知识点的理解和应用能力。关于这些知识点的“档案”，你可以点击相应的链接进行查看和学习。
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