Помогите сделать упражнение. надо раскрыть скобки, используя истиннее абсолютное время либо

Помогите сделать упражнение. надо раскрыть скобки, используя истиннее совершенное время либо прошедшее неопределенное время:
1. We (to be) at the History Museum already, now we are doing to the Kremlin.
2. My brother and I (to go) to the mountains last year.
3. They (to read) an interesting adventure book just now and we are going to discuss it.
4. I (to do) my lessons and can go for a walk.
5. Last winter vacation we (to visit) st. Petersburg.
6. "(to be) you to Suzdal?" "Yes, I (to be) there many times. Its a wonderful Russian town."
7. "Have you had lunch?" "No, I (to have) lunch yet".
8. "Yesterday we (to have) a meeting. We (to be) you away?" "I (to be) ill."