1. This chemical acts a part of an acid in our experiment.

2. Stella felt unnatural in their company, as if she was acting a part.

3. Hannah Benn knew that she would have to spend her evening acting a part.

4. These were his friends but he felt unnatural in their company, as if he were acting a part.

5. She couldn't be completely spurious; no-one could act a part like that.

6. She doesn't act a part, even the part of a great Zen master.

7. Each of you will act a part in the play.

8. She is going to act a part in the play.