Помогите задать вопросы к предложениям..
1) I'll take some medicine as I have a headache
2) They have been working on this report for a month
3) My friend have visited exhibition this week
4) Ske is cooking an apple pie now

1)If you have a headache,what will you do? 2)How long they were working on this report? 3)What your friend had been doing on this week? 4)what she is cooking now?