请选择ABC4e,u)n-Q7`,~:O -Is this your book? -_________________.:e-E:h/l*J5g:j
A. Yes! It"s mine.:e-E:h/l*J5g:j
B. Thank you!:e-E:h/l*J5g:j
C. OK.:e-E:h/l*J5g:j