单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．She left the lecture for a few minutes.
B．She was reading during the lecture.
C．She may have fallen asleep.
D．She misunderstood the speaker’s last points.
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单项选择题
A．A Royal Canadian Mounted Police happened to notice him on the street.B．3. Royal Canadian Mounted Police recognized Ray’s photo and started to investigate.C．The British Police was informed and Ray was found at London Airport.D．Royal Canadian Mounted Police and British Police worked together to arrest him.
A．A Royal Canadian Mounted Police happened to notice him on the street.
B．3. Royal Canadian Mounted Police recognized Ray’s photo and started to investigate.
C．The British Police was informed and Ray was found at London Airport.
D．Royal Canadian Mounted Police and British Police worked together to arrest him.
单项选择题
A．Because men on the Earth are protected by the atmosphere.B．Because radiation only have short-term effects on men on the Earth.C．Because the Earth is quite far from the radiation areas.D．Because the Van Allen Belts absorb all radiation.
A．Because men on the Earth are protected by the atmosphere.
B．Because radiation only have short-term effects on men on the Earth.
C．Because the Earth is quite far from the radiation areas.
D．Because the Van Allen Belts absorb all radiation.
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