单项选择题

A．Write their lab report.
B．Find out Professor Smith’’s schedule.
C．Interview some high school students.
D．Finish their chemistry experiment.
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单项选择题
A．This morning.B．This evening.C．Friday morning.D．Friday evening.
A．This morning.
B．This evening.
C．Friday morning.
D．Friday evening.
单项选择题
A．The raid had been photographed by hidden cameras.B．Some watchmen had seen the raid.C．The bank teller proved that Joe was the robber.D．Some monitors had been installed nearby.
A．The raid had been photographed by hidden cameras.
B．Some watchmen had seen the raid.
C．The bank teller proved that Joe was the robber.
D．Some monitors had been installed nearby.
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