Choose the most suitable determiner for the given sentence. You’ve met Linda,…

Correct answer: another.

Why this is correct: "another" means "one more" or "an additional" and is used with singular countable nouns.

• Use with singular nouns: "sister" is singular, so "another sister" = one more sister. Example: "You’ve met Linda, but I have another sister who you haven’t met, called Margaret."

• Compare with "the other": "the other" refers to a specific remaining one in a known set of two. It would be appropriate only when there are exactly two sisters.

• Compare with "other": "other" is used with plural or uncountable nouns (e.g., "other sisters", "other information"). It is not used directly before a singular count noun.

• "Few" is a quantifier for plural nouns (e.g., "few sisters") and cannot be used with the singular noun "sister."

Correct sentence: You’ve met Linda, but I have another sister who you haven’t met, called Margaret.

Summary: "Another" is the best choice because it signals one additional, unspecified sister and matches the singular countable noun.