It is reported that between the year 1550 and 1950 about one kind of living things___each year .
| A．died out | B．died of | C．died from | D．died down |
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It is reported that between the year 1550 and 1950 about one kind of living things___each year .
| A．died out | B．died of | C．died from | D．died down |
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