单项选择题

What is true of sleepwalking according to the passage

A．It is caused by emotional conflict or guilty conscience.
B．It is the acting out of a vivid dream.
C．Somnambulists are asleep during their sleepwalking.
D．It is dangerous to waken a sleepwalker.

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单项选择题

Who was supposed to be the world’s champion sleepwalker

A．The man walked sixteen miles along a dangerous road.
B．The boy walked five hours in his sleep.
C．The student habitually walked to the Iowa River and swam in his sleep.
D．The man danced a minuet in his sleep.

单项选择题

The writer makes it obvious that ______.

A．sleepwalkers are often awakened by dangers
B．the underlying cause of sleepwalking is more serious than sleepwalking itself
C．most sleepwalkers are deranged or insane
D．All of the above.