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【参考答案】

is：are(改is为are)。
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单项选择题
A．Its location for viewing in the world.B．Its timing on the calendar.C．Its movement across the sky.D．Its beautiful scene.
A．Its location for viewing in the world.
B．Its timing on the calendar.
C．Its movement across the sky.
D．Its beautiful scene.
单项选择题
A．A bomb threat at a hospital.B．A flood at a school.C．A fire at an apartment building.D．A severe drought famine in a village.
A．A bomb threat at a hospital.
B．A flood at a school.
C．A fire at an apartment building.
D．A severe drought famine in a village.
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