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

游客2024-01-05  7

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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