It was the hurricane ______ was called Katrina ______ destroyed the city of New Orleans. 

It’s not what we do once in a while ______ shapes our lives, but what we do consistently.

It is usually not quite cold in this area in March, but sometimes temperature________ be very low.

Jessica has always been honest and straightforward, and it doesn’t matter ________ that she’s talking to.

When I try to understand ____ that prevents so many Americans from being as happy as one might expect, it seems to me that there are two causes.