-Listen to the tape then answer this question.whose shirt is white?-
TEACHER:Whose shirt is that?
TEACHER: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.
TEACHER:Tim!
TIM:Yes,sir?
TEACHER:Is this your shirt?
TIM:Yes,sir.
TEACHER:Here you are.Catch!
TIM:Thank you,sir.