помогите пожалуйста с тестом по британскому Use the required form

Помогите пожалуйста с тестом по британскому
Use the required form of the infinitive in brackets. Insert the particle to where necessary
1.I decided (to make) a fuss, and went (to look) for Robinson.
2. We walked to the door and I saw her (to go) in and down the hall. I liked (to watch) her (to move).
3. Let's (to go) and (to find) him, he's sure (to be) in front of his picture.
4. It's very interesting (to hear) you (to say) that.
5. Some important decisions must (to make) soon.
6.I think he must (to suffer) from injury now.
7. You must (to dream) of it long.
8. Let me (to hold) the baby, Scarlett. Oh, I know how (to hold) babies.
9. She noticed that he seemed (to look) at the sideboard and with her engaging smile leaned forward.
10. But there is something else (to do).
11. "If you've got nothing to say," I said, "why (to try) (to say) it? Why not (to have) a little rest?"
12. There was one more announcement (to make).