填空题

Paragraph 3 ______

【参考答案】

A
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填空题
Paragraph 4 ______
单项选择题
The passage indicates that
A．humans can never regenerate limbs.
B．humans might be able to regenerate limbs in the future.
C．human limbs may be regenerated on some animals first.
D．regeneration of human limbs will soon become a reality.
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