Решение:
Чтобы сократить предложения, нужно использовать апостроф (') вместо пропущенной буквы.
- I am beautiful. --> I'm beautiful.
- It is my cat. --> It's my cat.
- We are happy. --> We're happy.
- She is my sister. --> She's my sister.
- You are very clever. --> You're very clever.
Ответ: I'm beautiful.; It's my cat.; We're happy.; She's my sister.; You're very clever.