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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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
单项选择题
The goal of Noah's Ark Project is to_______.
A．make efforts to clone the endangered panda
B．save endangered animals from extinction
C．implant embryo into a host animal
D．collect DNA of endangered animals to study
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