单项选择题

Questions 22 to 25 are based on the conversation you have just heard.

A．Confident.
B．Shocked.
C．Nervous.
D．Reluctant.
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填空题
What did the author learn from what she saw in Ascot
单项选择题
A．A bat caught the insect in midair and ate it.B．Dolphin’s clicking sounds bounced off the fish and back to it.C．A person heard an echo when he shouted into the valley.D．A dog heard his owner’s whistle because he used ultrasound.
A．A bat caught the insect in midair and ate it.
B．Dolphin’s clicking sounds bounced off the fish and back to it.
C．A person heard an echo when he shouted into the valley.
D．A dog heard his owner’s whistle because he used ultrasound.
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