----------you------------(swim) at the sports meeting yesterday?
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----------you------------(swim)atthesportsmeetingyesterday?----------you------------(swim)atthesport
----------you------------(swim) at the sports meeting yesterday?
----------you------------(swim) at the sports meeting yesterday?
----------you------------(swim) at the sports meeting yesterday?
为你解答.
（Did）you (swim) at the sports meeting yesterday?
昨天运动会上你游泳了吗?