He__in IBM to sell computers for five years and is now running a successful business of his own!Aworked Bhas been worked 选哪个 为什么

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He__in IBM to sell computers for five years and is now running a successful business of his own!Aworked Bhas been worked 选哪个 为什么
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He__in IBM to sell computers for five years and is now running a successful business of his own!Aworked Bhas been worked 选哪个 为什么
He__in IBM to sell computers for five years and is now running a successful business of his own!
Aworked Bhas been worked 选哪个 为什么

He__in IBM to sell computers for five years and is now running a successful business of his own!Aworked Bhas been worked 选哪个 为什么
答:B has been worked
释:因为句中for five years.for+一段时间,时态为现在完成时.