单项选择题

In Kraemer' s opinion, if some species died out, it would possibly _______.

A．affect the existence of other species
B．do good to other species
C．reproduce the species in the future
D．clone the species right now

<上一题目录下一题>

热门试题

单项选择题The word groundbreaking (Line 3, Para. 5) can be best replaced by _______.

单项选择题According to Professor Kraemer, the main problem in cloning pandas would be the lack of_______.