1, The sewing machine was invented by Elias Howe in 1845.
2, Tom wasn't allowed to take those books homw by the librarian.
3, Knowledge on recycling will not be taught by the teachers tomorrow.
4, A lot of tourists is attracted by Hoi An.
5, Was the first-aid course attended by all students last year.
6, Cows can be milked by farmer twice a day.
7, Hoa was taught how to give first-aid on the phone by the nurse.
8, When I came, the computer was being repaired by him.
9, A lot trees will be grown in the parks by us.