听力原文：W: How do you pay for your purchases with a credit card?
M: Usually I sign a sales slip in the presence of the seller, and the signature is then compared to the signature on the card.
Q: Where should the man sign when he pays for his goods with a credit card?
(20)
A．On his card.
B．On the goods.
C．On a sales slip.
D．On the invoice.

A.
Q:
B.On
C.
B．On
D.
C．On
E.
D．On
F.


【参考答案】

C
解析：对话中男士说道“usually I sign a sales slip”，即他通常在购物单上签字。