单项选择题

The word "groundbreaking" ( paragraph 7 ) can be interpreted as ______.

A．pioneering
B．essentially new
C．epoch - making
D．evolutionary
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单项选择题
If we don't take immediate actions, pandas are likely to become extinct in ______.
A．3 to5 years
B．1 year
C．25 years
D．2years
单项选择题
The best title for the passage may be ______.
A．China's Efforts to Clone Pandas
B．China--the Native Place of Pandas Forever
C．Exploring the Possibility to Clone Pandas
D．China's First Cloned Panda
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