EXERCISE C5–2Topic sentences
Example:

For a paragraph in a paper offering advice to job seekers, which version would work well as a topic sentence?

Sometimes body language can tell an interviewer as much about a job candidate as the candidate’s responses to questions can.

Job candidates who sit with arms folded across the chest for an entire interview come across as unfriendly and disengaged.

The first sentence expresses an idea that can be developed in a paragraph.