I have been English ten years.A. study; for B. studying; since C. studying ; for

问题补充：

I have been English ten years.

A. study; for B. studying; since C. studying ; for

答案：

解析：考查现在完成进行时。句意“我学英语已经学了十年了。”有可能继续学习下去，故用现在完成进行时，即have been doing sth.句型。Since不能加一段时间，for可以加时间段，故选C。

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