Hmm. Looking at the practice midterm keys, some of them seem like they’re not without errors. In particular, some of the descriptive red text seems to have gotten carried over from Fall 2011, to Fall 2012, to Spring 2013, without having been updated to reflect the new sentences in the different tests. The answers to the problems themselves appear to be correct, but don’t trust the little prose explanations, particularly if they refer to something like “chairs with arms” in a sentence that doesn’t talk at all about chairs or arms. Too late really for me to do anything about it now, I guess, sorry for not catching that before posting them.