One reason why pertinent fossils are (i)____ is that crucial stages of evolution

游客2024-01-10  20

问题 One reason why pertinent fossils are (i)____ is that crucial stages of evolution occurred in the tropics where it is difficult to explore for fossils, and so their discovery has (ii)____.

选项 A、unique...resulted
B、unconcealable...declined
C、uncommon…lagged
D、recent…resumed
E、prominent…failed

答案 C

解析 空格(i):
- 方程等号:One reason why…is that…表示因果,同义重复。
- 强词和对应:difficult to explore指向空格(i),根据one reason why…is that…前后取同,体现“困难”。unique独一无二的,unconcealable无法隐藏的,uncommon不常见的,recent最近的,prominent显著的。选项A和C合适。
空格(ii):
- 方程等号:so表示因果,前后同义重复。
- 强词和对应:their指代fossils,difficult指向空格(ii),and so表示前后取同,表示化石勘探很“困难”,填入一个负向词。result结果(错),decline减少(对),lag滞后(对),resume恢复(错),fail失败(对)。综合空格(i),答案选C。
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