Look at this story starter and determine which word in parentheses is the correct form to use in each case. Check your answers here.

I (use, used) to be better at saying no. I was (suppose, supposed) to be writing a report, but (to, too, two) friends called and asked if I wanted to go spelunking, (which, witch) they had to explain meant exploring in caves.

Agreeing to go along with my friends, (who, which, that) weren't experienced spelunkers, was my first mistake. When we got to the cave, (there, their, they're) was a huge rock blocking the entrance. At first the rock (seamed, seemed) to be (stationery, stationary), but using all the strength we had we were finally able to move it (slow, slowly) and get inside. It was (than, then) that I should have left and gone home, but I didn't know (weather, whether) my friends would be disappointed in me if I left them. My (sole, soul) reason for staying was to keep face with them, and so the three of us formed a little spelunking (troop, troupe) and set off to explore.

Staying in the cave was my second mistake. When we were fairly deep inside, I became fascinated with a (stalactite, stalagmite) (that, which) was shaped like a (throne, thrown) and decided to take a break and (sit, set) on it for a while. At that point, I realized I was hungry and decided to (try and, try to) convince my friends that we should stop and eat the lunches we had brought.