Listen to the tape then answer this question. Whose shirt is white? 听录音，然后回答问题。 谁的衬衣是白色的？
HEACHER：Whose shirt is that? HEACHER：Is this your shirt, Dave? DAVE: No. Sir. It's not my shirt. DAVE: This is my shirt. My shirt's blue. TEACHER: Is this shirt Tim's? DAVE: Perhaps it is, sir. Tim's shirt's white. HEACHER：Tim! TIM: Yes, sir? HEACHER：Is this your shirt? TIM: Yes, sir. HEACHER：Here you are. Catch! TIM: Thank you, sir.