He_____ articles for our wall-newspaper these years, and he____ about thirty articles.

A．has written; wrote                      B．has been writing; wrote

C．is writing; has been writing                D．has been writing; has written

 He _____ articles for our wall-newspaper these three years, and he _____ about forty articles.

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

He_____ articles for our wall-newspaper these years, and he____ about thirty articles.

He ________ articles for our wall-newspaper these three years, and he ______about forty articles.

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