问题描述：
①We have been learning English for three years.(改为同义句）
We have been learning English___ ____ ____ ____.
②I started playing tennis when was seven years old.(改为同义句）
I started playing tennis ____ ____ ____ ____ seven.
We have been learning English___ ____ ____ ____.
②I started playing tennis when was seven years old.(改为同义句）
I started playing tennis ____ ____ ____ ____ seven.
问题解答：
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