Given below are sentences that use discourse markers/expressions to make them complete. Identify the most appropriate discourse marker and mark your answer accordingly on the Answer Sheet. __________, have you been to the local library yet?

Step-by-step solution

The sentence introduces a new topic or a passing thought in a conversation. The discourse marker 'Incidentally' is used to introduce a new subject or add a piece of information, similar to 'by the way'. The other options do not fit the context: 'Sort of' means to some extent, 'Frankly' means honestly, and 'All the same' means nevertheless. Thus, the complete sentence is: 'Incidentally, have you been to the local library yet?' Answer: Incidentally