Because vs Because of

I don't like rap ... it's hard to understand.

• because

• because of

We can't go to the concert ... the rain.

• because

• because of

They must practice every day ... the music competition.

• because

• because of

I am happy ... I met my grandmother.

• because

• because of

I am late to school ... the traffic

• because

• because of

She is sad ... her cat is lost.

• because

• because of

I can't sleep ... the music is noisy.

• because

• because of

I am happy ... you.

• because

• because of

She likes singing ... it's her hobby.

• because

• because of

Our teacher didn't come ... he is sick.

• because

• because of