单项选择题

A．To describe an upcoming video presentation,
B．To introduce a lecture series.
C．To introduce a speaker to a group.
D．To provide background information for a special exhibit.
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单项选择题
A．Children don’t get enough education safety.B．Children are keen on dangerous games.C．The playgrounds are in poor condition.D．The playgrounds are overcrowded.
A．Children don’t get enough education safety.
B．Children are keen on dangerous games.
C．The playgrounds are in poor condition.
D．The playgrounds are overcrowded.
单项选择题
A．Friends.B．Sea birds.C．A trip.D．Fridays.
A．Friends.
B．Sea birds.
C．A trip.
D．Fridays.
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