Of course she could. The misspellings are obvious errors, and the single inverted phrase stands out and can easily be repaired. Even if the variations were more numerous or more diverse, the original could still be reconstructed with a high level of confidence if we had enough copies. This, in simplified form, is how the science of textual criticism works. Textual critics are academics who reconstruct a missing original from existing manuscripts that are generations removed from the autograph.
Textual criticism allows an alert critic to determine the extent of possible corruption of any work.
The ability of any scholar to do effective textual criticism depends on two factors. The more copies there are, the easier it is to make meaningful comparisons. If the numbers are few and the time gap is wide, the original is harder to reconstruct with confidence. However, if there are many copies and the oldest existing copies are reasonably close in time to the original, the textual critic can be more confident he's pinpointed the exact wording of the autograph. To get an idea of the significance of the New Testament manuscript evidence, note for a moment the record for non-biblical texts.