tolong kerjakan soal past tense bahasa inggris

1)(-)she wasn't a famous actress
(?)was she a famous actress?

(2)(+)they were student of oxford university

(_)they were not student of oxford univercity
3)(+)john talk to his mom yesterday
(?)did john talk to hos mother yesterday?
(4)rosman get certificate last month

(-)rosman didn't get certificate last month

tolong jadikan jawaban terbaik please