【正确答案】 C

【答案解析】原文： M: How much are these books? W: 345 yuan. How would you like to pay, cash or card? M: Do you accept Wechat pay? W: Yes, of course. Would you like to have your books delivered to your home? We offer free delivery. M: That would be perfect. Thank you. W: When would you like it to be delivered? M: Tomorrow. W: No problem. Would you please give me your address? M: OK. 6.How is the man going to pay for the books? 7.What offer does the woman give the man? 8.When does the man want the books delivered?细节推断题。对话开头男士询问女士书的价格，女士告知价格，并问男士使用现金支付还是刷卡支付，男士没有直接回答，而是问女士能否接受微信支付，由此推断男士想使用微信付款，故C)“使用微信”为本题的答案。A)“使用信用卡”、B)“使用现金”和D)“使用支票”均与对话内容不符，故可排除。