Вставь was или were 1) there a book in the bag yesterday 2) shelf on the wall last month 3) in the room yesterday 4) in the forest last week 5) it a nice drees 6)they friends last summer 7) shool yesterday

1)was
2)was
3)were
4)was
5)was
6)were
7)were
если множественное число, пишется were
если единственное число, пишется was

1) There was a book in the bag yesterday
2) There was a shelf on the wall last month
3)You were in the room yesterday
4)She was in the forest last week
5) It was a nice dress
6)They were friends last summer
7)We were at shool yesterday