answer: your best option would be A.
explanation:
let's analyze our options.
<em>The club is not accepting any new members during the summer. </em>"is not accepting" means that they are currently not accepting, so this option is correct.
<em>All the kids decided to go down the street and roller skate. </em>after looking at it for a few minutes, i believe this is incorrect too because A fits better, and decided would mean past.
<em>We will be going to the Grand Canyon as soon as Dad leaves work:</em> this is not correct, since it includes "will be" means it is happening in the future.
<em>I had thought that the soccer game was going to be exciting, but I was wrong: </em>this is not correct. the "had thought" signals it happened it the pst.