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【题目】So far the young man _______ anything useful, but he will keep trying.

A. won’t inventB. didn’t inventC. doesn’t inventD. hasn’t invented

【答案】D

【解析】

句意:迄今为止,那个年轻人没有发明有用的东西,但是他仍然一直努力。won't invent没有发明,一般将来时;didn’t invent没有发明,是一般过去时;doesn’t invent没有发明,是一般现在时;hasn’t invented还没有发明,是现在完成时。根据so far可知,此处用现在完成时,故选D

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