单项选择题

She didn't ring the communication cord immediately because ______.

A．she was very much afraid
B．there was no point of doing so
C．she was too shocked to move
D．the ticket collector came in
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单项选择题
When Mrs. McGillicuddy's train passed through a station, it ______.
A．gained speed suddenly
B．kept its usual speed
C．changed its speed
D．stopped immediately
单项选择题
Mrs. McGillicuddy seems to be a (an) ______ person.
A．observant
B．interested
C．nosy
D．nervous
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