Question

WRITE the sentences talking about OBLIGATIONS

A) He/ cheer/ for the rival team.

B) She/ drag /all the dirty

C) I / compare/ the two dresses

D) They / borrow / his bike

E) You / ask / her out.

Answer 1

He must not cheer for the rival team.
She must drag all the dirty
I have o compare the two dresses.
They have to borrow his bike,
You must ask her out.

Todas essas são obrigações. Tanto faz o uso do must ou have to. Não sei se a intenção do professor era colocar algumas "sugestoes" que seria o "should". Mas creio que está correto desta forma.