单项选择题


A．on
B．in
C．for
D．to
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单项选择题
A．practiceB．ruleC．lawD．sense
A．practice
B．rule
C．law
D．sense
单项选择题
If people are exposed to bright red, which of the following things does NOT happen
A．They breathe faster.
B．Their blood pressure rises.
C．They feel afraid.
D．Their hearts beat faster.
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