单项选择题

According to the passage, what might be human being's best choice for the final exit

A．Leaving the timing to nature.
B．The saurian-like elimination.
C．Being burned by the sun's heat.
D．An exit driven by man's rationality.
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单项选择题
According to the author, after human left the stage, a new species would develop ______.
A．in a process similar to that of human's evolution
B．from dolphin, chimp or orchid to human again
C．as much intelligence as human
D．after a particular span of time
单项选择题
What does the author think interstellar travel can do
A．It practically enables human to escape the end of the world.
B．It simply postpones the process of human extinction.
C．It helps human avoid the fate of being vaporized or frozen.
D．It is a way to help human escape from death by gravity.
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