单项选择题

The researchers have conducted an experiment to prove that people. will act in emergencies when_____.

A．they are in pairs
B．they are in groups
C．they are alone
D．they are with their friends
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单项选择题
What is the main idea of the forth paragraph
A．Impact of robots.
B．Relationship between robots and jobs.
C．Robotic manipulators.
D．Damages of robots.
单项选择题
Jessamy Harrison is a girl who_____.
A．is a native British girl
B．is out of her mind
C．is a born in a poor family
D．have trouble in controlling her temper
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