◎ 题干
You can see the bright Yao Ming today, but can't imagine what a hard time he had _____ himself home and abroad before.

A. training
B. trained
C. to train
D. train
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“You can see the bright Yao Ming today, but can't imagine what a hard time he had _____himself home and abroad before. [ ]A. training B. trainedC. to train D…”主要考查了你对  【动名词】  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。