答案：They went to the store to 【buy】some fruits and vegetables.But they were
【sold】out.
翻译；他们去商店买了些水果和蔬菜.但是它们卖不出去.
注意；But they were 【sold】out.这里是被动语态.
解析；水果和蔬菜是被人卖的.
不明白及时追问,
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