She wanted to knit a scarf ,but she ...... of wool before she was finished.
`=>`She wanted to knit a scarf ,but she ran out of wool before she was finished.
Dịch:Cô ấy muốn đan một chiếc khăn, nhưng cô ấy hết len trước khi hoàn thành.
`->`Thì quá khứ đơn`=>` nên run out `=>`ran out.