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I found the German language hard________.

A. to learn 　　　　    B. to be learned     C. learning 　　　　   D. learned

A. to learn 　　　　    B. to be learned     C. learning 　　　　   D. learned

I found the German language hard ________.

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I found the German language hard ________.

[　　]

I found the German language hard ________.

[　　]