单项选择题


What have the people probably been doing

A．Having a picnic.
B．Enjoying a concert.
C．Watching a picnic.
D．Eating out.
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Why do dolphins use clicks
A．To communicate with other dolphins.
B．To recognize objects in the water.
C．To learn human language.
D．To express fear.
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How many total courses must a student take for a literature major
A．Three.
B．Five.
C．Eight.
D．Ten.
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