Can anyone tell me that how these sentences are converted into active voice?

1. Alice was not much surprised at this.

2. He will be greatly surprised if he is chosen.

3. The streets were thronged with spectators.

Please help me!

First, can you try yourself?

Hi there!

1. This wasn't surprising me much.

2. If only they choose him and that's really surprising him.

3. The spectators were thronging the streets.

Teachers: We supply a list of EFL job vacancies
Yipes! Not so good, Anon. Let's see how the original poster does. After all, Clive asked Helen to try first.