1.(-)He did not write a book
(?)Did he write a book?
2.(-) She was not my boss
(?) Was she my boss?
3.(+)They built a new house
(?) Did they build a new house?
4.(+) I was at the concert last sunday
(?) Was I was at the concert last sunday?
5.(+) You bought clothes shop
(-) you didn't buy chothes shop
1.C 2.C 3.a