George, the lonely tortoise, was said ________ on a tiny island of Pinta in 1971．
| A．to have discovered | B．to have been discovered |
| C．having discovered | D．having been discovered |
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George, the lonely tortoise, was said ________ on a tiny island of Pinta in 1971．
| A．to have discovered | B．to have been discovered |
| C．having discovered | D．having been discovered |
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