Question

we aren't going to the swimming pool ---- it's raining

Answer 1

Respuesta:

we aren't going to the swimming pool because it's raining

espero te ayude!

Answer 2

La palabra que te hace falta seguramente es "because", que significa "porque". La oración quedaría.

We aren´t going to the swimming pool because it´s raining.

No nos vamos a la piscina porque está lluviendo.

Espero haberte ayudado :D