单项选择题

This passage is mainly about（）。

A．how to have a sound sleep
B．what causes loss of sensations
C．what will happen if sensations were lost
D．how to lose sensations

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单项选择题
People belonging to blood group B might be good at ________.
A．sports and games
B．smoothing away difficulties
C．doing office work
D．painting and writing
单项选择题
According to the passage, ________.
A．four types of the blood were discovered by Japan
B．people of good blood might do their work very well
C．knowing your own blood group you could get a good idea
D．more and more countries accepted the new idea about blood group
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