I've been practising for the coming SAT, and I got confused by this question from the writing section. It read something like this:
John was one of the astronomers who devoted all their time to science.
It was in the error identification section, and the insidious error was in the pronoun "their". Could you please explain this to me?
I'm sorry, my fault. I've found the original, and now I clearly see the error. Here is the original sentence:
George Thornton Emmons was one of a handful of ethnographers who committed their life to studying the Tlingit culture of Northwest Coast.
The error is obviously in "life". It should be "lives". I feel ashamed of myself. Sorry I bothered you, and anyway, thank you for your responses.