问题描述：
谁帮我把英文句子转成问句
第一题：My sister called her friend yesterday 第二题：She talked to him for an hour 第三题：he studies piano at the unversity 第四题：My parents have two cars
第一题：My sister called her friend yesterday 第二题：She talked to him for an hour 第三题：he studies piano at the unversity 第四题：My parents have two cars
问题解答：
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