Choose the correct alternative: 1. We use 'I'll' when we've just decided to do something. 2. We cannot use the present simple with 'I'll'. 3. We ...

Choose the correct alternative:


1. We use 'I'll' when we've just decided to do something.
2. We cannot use the present simple with 'I'll'.
3. We often use 'I think I'll' and 'I don't think I'll'.
4. We use 'will' to talk about what we decided before.
5. We use 'shall' to offer to do something.