Read the following paragraph and underline the topic sentences.
Working in the neighborhood grocery store as a checker was one of the worst job I’ve ever had. In the first place, I had to wear an ugly, scratchy uniform cut at least three inches too short. My schedule of working hours was another inconvenience because my hours changed each week, it was impossible to make plans in advance, and getting a day off was out of the question. In addition, the lack working space bothered me. Expect for a half-hour lunch break, I was restricted to three feet of room behind the counter and consequently felt as if I were no more than a cog in the cash register.