问题详情：
![改错：Nevertheless,mylaterexperienceprovesthatpracticingca...]( "改错：Nevertheless,mylaterexperienceprovesthatpracticingca...")
改错：Nevertheless, my later experience proves that practicing calligraphy was both necessary and beneficial.
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【回答】
proves→proved 根据后面的was可知，发生在过去的事情，故将proves改为proved。
知识点：一般过去时及其被动式
题型：短文改错
