单项选择题

What did a team of French researchers find under the surface of Mars

A．Cryopreserved organisms
B．Water
C．Microbes.
D．Block of ice.
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单项选择题
The best title for the passage might be _________.
A．Life Possibility on Mars.
B．Creatures Frozen 320,000 years Still Alive.
C．Growth of Microorganisms.
D．New Scientific Discovery.
单项选择题
_________ brings about happiness has utility, according to the doctrine of utilitarianism.
A．It
B．each
C．Whatever
D．Why
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