30. According to the passage, it is believed that the largest extinction of a species occurred (A) 26 million years ago (B) 65 million years ago (C) 225 million years ago (D) 250 million years ago

26. According to paragraph 2, evidence from fossils suggests that (A) extinction of species has occurred from time to time throughout Earth’s history. (B) Extinctions on Earth have generally been massive (C) there has been only one mass extinction in Earth’s history. (D) dinosaurs became extinct much earlier than scientists originally believed.

30. According to the passage, it is believed that the largest extinction of a species occurred (A) 26 million years ago (B) 65 million years ago (C) 225 million years ago (D) 250 million years ago

其他試題

30. According to the passage, it is believed that the largest extinction of a species occurred
(A) 26 million years ago
(B) 65 million years ago
(C) 225 million years ago
(D) 250 million years ago