fine mornings, old people get together and do exercise by the lake.A. On B. At ——青夏教育精英家教网——

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

　　A．On　　B．At　　C．To D. In

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