The word "it" in line 3 refers to [br] According to the passage, it is believe

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问题 The word "it" in line 3 refers to [br] According to the passage, it is believed that the largest extinction of a species occurred

选项 A、26 million years ago
B、65 million years ago
C、225 million years ago
D、250 million years ago

答案 C

解析

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Theword"it"inline3refersto[br]Inparagraph3,theauthormakeswhich