WAEC - English Language (1990 - No. 55)
From the words or groups of words lettered A to D, chose the word or group of words that best completes the sentence.
That is not your book, it is
That is not your book, it is
John's
Johns' own
for John's
John
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The apostrophe + "s" ('s) is used to indicate possession. In this context, the sentence implies that the book belongs to John, so "it is John's" is the correct way to show ownership.