We ____ (cocinar) dinner soon. [NECESSITY]
need to cook
We ____ (limpiar) the house. [OBLIGATION]
have to clean
The students ____ (escribir) their answers on the answer sheet. [OBLIGATION]
have to write
They ____ (llevar puesto) uniforms at their school. [OBLIGATION]
have to wear
He ____ (ir) to work on Saturdays. [OBLIGATION]
has to go
You ___ (creer) everything they say. [Negative OBLIGATION]
don't have to believe
I ___ (dormir) eight hours every night. [NECESSITY]
need to sleep
I ____ (comprar) more lettuce to make a salad. [NECESSITY]
need to buy
The cat ____ (estudiar). [Negative NECESSITY]
doesn't need to study
We ____ (leer) the instructions before starting. [NECESSITY]
need to read