He _____ articles for our wall-newspaper these three years, and he _____ about forty articles.
| A．has been writing； has written | B．has been writing； wrote |
| C．is writing； has been writing | D．has written； has written |
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He _____ articles for our wall-newspaper these three years, and he _____ about forty articles.
| A．has been writing； has written | B．has been writing； wrote |
| C．is writing； has been writing | D．has written； has written |
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