Laszlo Biro is considered the ball-point pen. A. to invent B. inventing C. to be invented D.——青夏教育精英家教网—

摘要：Laszlo Biro is considered the ball-point pen. A. to invent B. inventing C. to be invented D. to have invented

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Laszlo Biro is considered ____ the ball point pen.

A. to invent B. inventing

C. to be inventing D. to have invented

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