Which sentence expresses an action that is happening in the present? a) the club is not accepting any new members during the summer. b) all the kids decided to go down the street and roller skate. c) we will be going to the grand canyon as soon as dad leaves work. d) i had thought that the soccer game was going to be exciting, but i was wrong.

your best option would be A.

explanation:

let's analyze our options.

The club is not accepting any new members during the summer. "is not accepting" means that they are currently not accepting, so this option is correct.

All the kids decided to go down the street and roller skate. after looking at it for a few minutes, i believe this is incorrect too because A fits better, and decided would mean past.

We will be going to the Grand Canyon as soon as Dad leaves work: this is not correct, since it includes "will be" means it is happening in the future.  

I had thought that the soccer game was going to be exciting, but I was wrong: this is not correct. the "had thought" signals it happened it the pst.

it exposes the hypocrisy of religion and christian supporters of slavery