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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
A
由these three years可知應選現(xiàn)在完成進行時，表示“寫”從過去一直延續(xù)至今，并有可能繼續(xù)下去；“寫了40 篇”用現(xiàn)在完成時，表示到現(xiàn)在為止已完成的動作。
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