sananoor wrote:
Anthony Trollope, one of the most famous English novelists of the nineteenth century, alsowrote travel books, some based on his undertaking of journeys while an employee of the postal service.
a) wrote travel books, some based on his undertaking of journeys
b) wrote travel books, some based on journeys he undertook
c) undertook journeys, having based travel books on them
d) based travel books on journeys undertaken
e) wrote travel books, some based on journeys which he was to undertake
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