22. They don't the grammar point before. A. look as though they study
B. sound as if to study
C. appear like they were studying
D. seem to have studied

D

Explanation:

It sounds more fluent when you say it, while the other options are a bit weird sounding

kenny´s more than 25 years of relevant public service. in the army for two decades, as official representative for four years, and now for the department of state, as ambassador. this career clearly demonstrates great capacities in the public sector.

the words “strangest” and “unusual” suggest that the narrator is about to tell the story of an odd or puzzling group of people.