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1.she was singing happy when the teacher came into the classroom
2.the goose were swimming beautifully
3.neither Jane nor Ann are going to come today
4.mr. Black worked hard in the garden, he sold fruit and vegetables. he had  enough money to live comfortable.
5.neither Tom nor his brother didn't go to school yesterday
6.he hasn't met neither Nell nor her mother
7.it was rain at seven o'clock yesterday
8.it was rain yesterday
9.i think it will be snow timorrow

1. she was singing happily when the teacher came into the classroom2. the geese were swimming beautifully3. neither Jane nor Ann is going to come today4. mr. Black worked hard in the garden, he sold fruit and vegetables. he had enough money to live comfortably.5. neither Tom nor his brother went to school yesterday6. he has met neither Nell nor her mother7. it was raining at seven o'clock yesterday8. it rained yesterday9. i think it will snow timorrow