TOEFL Listening: ETS-TOEFL听力机经 - H14OJ13D3EPY1432P$

Why does the man need to return to the bookstore? A. To hand in money from Professor Sims B. To provide a revised T-shirt design C. To tell the woman what colors will be used for the T-shirts D. To pick up a sample T-shirt to show to the astronomy group