--Is your father a teacher of English in the NO.1 Middle School?---No!But he ___English there for ten years.A.has taught B.has been teaching C.taught D.had taught为什么不选B?

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--Is your father a teacher of English in the NO.1 Middle School?---No!But he ___English there for ten years.A.has taught B.has been teaching C.taught D.had taught为什么不选B?
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--Is your father a teacher of English in the NO.1 Middle School?---No!But he ___English there for ten years.A.has taught B.has been teaching C.taught D.had taught为什么不选B?
--Is your father a teacher of English in the NO.1 Middle School?
---No!But he ___English there for ten years.
A.has taught B.has been teaching C.taught D.had taught
为什么不选B?

--Is your father a teacher of English in the NO.1 Middle School?---No!But he ___English there for ten years.A.has taught B.has been teaching C.taught D.had taught为什么不选B?
A项现在完成时,两种用法表示动作现在已经完成,重在强调发生在过去的事情对现在造成的影响.
B项现在完成进行时,表示动作从过去发生,持续到现在,将来可能继续持续下去.
C项一般过去时,纯粹叙述过去的事情,指过去发生这件事情了,与现在无关.
D项过去完成时,表示动作发生在过去的过去.
这里根据对话内容不难发现father以前是在这里工作的,而现在不是,也就是说在叙述爸爸以前的工作状态,没有强调对现在的影响,答案应该是C.