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fine mornings, old people get together and do exercise by the lake.A. On B. At C. To D. In 【查看更多】

 

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_____ fine mornings, old people get together and do exercise by the lake.    
[     ]
A. On
B. At
C. To
D. In

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__________fine mornings，old people get together and do exercise by the lake．

　　A．On　　B．At　　C．To D. In

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