Sure! Here are the correct items underlined:

1. The children **are having** so much fun at the circus!
2. Fiona **is looking** at some photos.
3. This jacket **fits** you perfectly. You should buy it.
4. Ron **wants** to become a pilot.
5. I **don’t understand** the meaning of that word.
6. He **loves** playing football.
7. I **am thinking** of buying a new CD.