Answers :
1. Tina will have cooked the burned one for sure.
2. Sora had went to last hope 3 days ago.
3. Jill did not drop this phone.
4. Our manager solved problems.
5. I will use money for good.
6. Jake cannot go back to home.
7. Did Jack do it?
8. Slackers will not save the future.
Method :-
Here, we are given the sentences in passive voice. To convert them into active, let's look at an example below -
That phone isn't dropped by Jill.
↓ ↓ ↓
Object Verb Subject
¤ In the above example, when we convert to active tense, the subject will be written first as same.
¤ Then the verb area will be converted a little as per the sense of the sentence. Like 'the next day' means tomorrow. So, the word will be 'tomorrow'. Examples:
☆ The previous day -> yesterday
☆ Tonight -> night
( There are many more like these. In order to learn them in detail, search at Brainly or Internet. )
¤ Then the object is also changed a bit as per sentence. Objects like phone, table, car will be the same but that phone, those boys etc, will be changed a little.
( There are many more like these. In order to learn them in detail, search at Brainly or Internet. )
Hope this helps !