问题描述：
英语大师进!
Tim's sister___ to swim in the West Lake yesterday.
A.see B.seen C.was seen D.was seeing
His aunt bought him a bicycle.（改为被动语态）：A bicycle___ _____ ____him by his aunt.
Tim's sister___ to swim in the West Lake yesterday.
A.see B.seen C.was seen D.was seeing
His aunt bought him a bicycle.（改为被动语态）：A bicycle___ _____ ____him by his aunt.
问题解答：
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