用所给单词的适当形式完成短文。
    Yesterday Grandma 1._____ (cook) fish Amy 2._____ (help)  her mother. Grandp3._____ (walk) in
the park. Sam 4._____ (play) on the computer. Tom 5._____ (play) with his toys. Their father 6._____
(watch) TV. They 7._____ (be) very happy.

【考点】一般过去时，动词过去式

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