单项选择题

What is a sign of a rainbow in the morning

A．Rains.
B．Wind.
C．Snow.
D．Fog.
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单项选择题
Which is not mentioned in the passage
A．They took No. fifty-two bus.
B．They love to explore the shop but have no time.
C．They go back by underground.
D．They will fly to New York the next day.
单项选择题
A．inB．atC．fromD．up on
A．in
B．at
C．from
D．up on
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