单项选择题

A．She was invited only for the weekend.
B．The weather was too hot.
C．She had an appointment.
D．She had schoolwork to do.
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单项选择题
A．Air traffic conditions.B．Traffic jams on highways.C．Road conditions.D．New traffic rules.
A．Air traffic conditions.
B．Traffic jams on highways.
C．Road conditions.
D．New traffic rules.
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