单项选择题

In Paragraph 2, what does the author imply by stating that the owners "anxiously watch the sky"

A．They want their pigeons to win the race.
B．They do not trust the judges to give a fair ruling.
C．They do not know the missions their pigeons have to carry out in the race.
D．They are sending radar signals to their pigeons.
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单项选择题
Why does the author mention bees, ants, toads, and turtles in the last paragraph
A．To interest the reader in learning about other animals.
B．To measure distances traveled by various animals.
C．To compare their home-finding abilities with those of homing pigeons.
D．To describe some unusual abilities of other animals.
单项选择题
What is the author' s purpose in writing this passage
A．To call on the readers to protect homing pigeons from extinction.
B．To offer the reader information about homings pigeons and their training.
C．To appeal to the owners of homing pigeons to set the birds free.
D．To convince the reader it worthwhile to keep a homing pigeon as pet.
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