____ you want to remember its usage, you’d better make a sentence with the new word. 

      Bill shows no interest in painting, there’s no sense in inviting him to the art show.

 I hope you don’t mind me asking, ____ where did you buy these books?

The other day，my brother drove his car down the street at________I thought was a dangerous speed.

 ________ lack of interest, Tom kept trying hard to catch up with others.