Choose the sentence that shows proper punctuation and capitalization. first the bell rang then all of the students put their books away after that they went to the gym to wait for the car pool First the bell rang; then, all of the students put their books away, after that, they went to the gym to wait for the car pool. First, the bell rang; then, all of the students put their books away; after that; they went to the gym to wait for the car pool. First, the bell rang; then, all of the students put their books away; after that, they went to the gym to wait for the car pool.