单项选择题

The passage states that before the blue square appeared, the person in the video ______.

A．was in a relaxed state
B．watched the screen closely
C．wondered what would happen
D．got ready to respond to a shock
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单项选择题
Why did participants feel frightened even though there was no shock going with blue squares
A．Because they experienced the first-hand fear.
B．Because they learned fear indirectly.
C．Because their brains were sensitive to colors.
D．Because their reacting system were monitored.
单项选择题
It can be inferred that when a child see his father feel fear at a snake,he probably ______.
A．regards his father's reaction as funny
B．feels scared by his father's unusual behavior
C．learn the fear from his father's response
D．turns to his mother for parental protection
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