单项选择题

According to Professor Kraemer, the main problem in cloning pandas would be the lack of______.

A．host animals
B．funds
C．available panda eggs
D．qualified researchers
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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
单项选择题
The word groundbreaking' (Line 3, Para. 5) can be best replaced by______.
A．pioneering
B．evolutionary
C．unimaginable
D．epoch-making
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