In the technical papers I edit, I quite often see a series of steps with the final one introduced by "At last" where it should clearly be "Finally". Connotation is really an issue there!
They also overuse and misuse "famous" and "popular"; "well-known" or "widely used" would be far more idiomatic when the topic is computational techniques.
Is the difference between "a working woman" and "a working girl" worth discussion?
There are a whole range of things you can do with political speech, though here you'd need to tread carefully. I once saw an exercise a colleague had based on three newspaper accounts of the same event. Two were the Guardian and the Telegraph, about as far left and right as major British papers get.
Consider the choices in sentences like:
In 1949, the Kuomintang [fled|retreated|were driven out] to Taiwan.
In 1959, [China|the Communists|the central government] [invaded|liberated] T.