单项选择题


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

A．A snowstorm.
B．An earthquake,
C．A traffic accident.
D．A hurricane.
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单项选择题
A．Many students try to study the whole night before an exam.B．Sleep may improve memory.C．Exams may harm memory.D．Sleep can improve listening ability.
A．Many students try to study the whole night before an exam.
B．Sleep may improve memory.
C．Exams may harm memory.
D．Sleep can improve listening ability.
填空题
B
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