He began to study English six years ago. He has studied English ______.for six

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问题 He began to study English six years ago.
He has studied English ______.

选项

答案 for six years

解析 some years ago用于一般过去时而for some years用于现在完成时。

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HebegantostudyEnglishsixyearsago.HehasstudiedEnglish______.forsix