单项选择题

A．Nine out of ten cats have a better chance of survival.
B．What is the significance of the seventh floor
C．What’’s the cats’’ terminal speed
D．Most cats can survive when falling.
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单项选择题
Why were only the flags of various European nations flown over the land during the discovery and settlement period
A．Because the flags were older than the national flag of the U. S.
B．Because the land was divided by these nations.
C．Because there was no universal flag over the land.
D．We don’’t know from the passage.
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