单项选择题

Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now listen to the passage.

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单项选择题
What does the speed of the tail-wagging dance tell other bees
A．The direction to fly in.
B．The distance to fly.
C．The height to fly.
D．The kind of food to find.
单项选择题
When do the swallows return to San Juan Capistrano
A．In March.
B．In early slimmer.
C．In October.
D．In April.
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