Resposta:

3.

a)bought

b) sold

c) gave

d) cut

e) worked

4.

a) Neg: He didn't find his keys.

Int: Did he find his keys?

b) Neg: She didn't forget your name.

 Int: Did she forget your name?

c) Neg: Billy didn't told her a secret

  Int: Did Billy told her a secret?

d) Neg: They weren't home yesterday.

 Int: Were they home yesterday?

Explicação: