题文
If Newton lived today, he would be surprise by whatin science and technology.
| A． | had discovered | B． | had been discovered |
| C． | has discovered | D． | has been discovered |
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If Newton lived today, he would be surprise by whatin science and technology.
| A． | had discovered | B． | had been discovered |
| C． | has discovered | D． | has been discovered |
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