Hi, can you help me to resolve this exercice pls ? Replace the underlined word with a word which is more suitable or more polite. - She's beautiful but her youn

Hi, can you help me to resolve this exercice pls ?
Replace the underlined word with a word which is more suitable or more polite.

- She's beautiful but her younger sister is really quite UGLY.
- I think Peter is getting a bit FAT, don't you ?
- I think she's hoping to meet a few BEAUTIFUL men at the tennis club.
- Paul is very THIN.

Thanks