1. aren't there?
2. wasn't it?
3. are they?
1)Did the walk to school?
2) Did the talk about children?
3)Did the cat push the box?
4) Did they invite their friends?
5) Did they collect stamps?
Ответ:1) There are four hundred people in the building.
2)....for half an hour
3).... but then we ordered one more
4)Each four years...(не уверена)
5).... the twelfth size
6) Hundreds of people...
7) percent
8) 30-year-old
9) ... the sixth volume
10) .. of the twentieth’s century
Объяснение: