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.
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单项选择题
A．Confident.B．Shocked.C．Nervous.D．Reluctant.
A．Confident.
B．Shocked.
C．Nervous.
D．Reluctant.
单项选择题
A．He laughed at the police.B．He looked forward to going to prison.C．He took his bottles with him.D．He went with the police without a struggle.
A．He laughed at the police.
B．He looked forward to going to prison.
C．He took his bottles with him.
D．He went with the police without a struggle.
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