5. May I have your bank card, please?
我可以看您的银行卡吗？
还能这样说：
Please let me have a look at your bank card.
Can you show me your bank card?
应用解析：
have not much to do with 与……无多大关系；
have on 穿着，戴着；有事要做；欺骗，捉弄；
have sth. to do with 与……有关；
have sth. against sb. 因某事不喜欢某人
6. I've lost my bank card.
我把银行卡弄丢了。
还能这样说：
I get lost my bank card.
I can't find my bank card any longer.
应用解析：
card catalogue 卡片目录；卡片目录区；
storage card 内存卡，储存卡；
key card 出入证，钥匙卡；
identification card 身份证
7. Do you think my bank card will defrost in a few days?
你认为我的银行卡会在几天之内解冻吗？
还能这样说：
May my bank card defrost in several days?
In your opinion, will my bank card defrost in several days?
应用解析：
few prophets 少量先知；
few hours 几个小时；
few showers 短暂阵雨；
only a few 仅仅少数，一点点
8. Keep the bank card well and inform us whenever you lose it.
请保管好银行卡，若遗失请告诉我们。
还能这样说：
Please put away your bank card safely and report to us whenever you lose it.
Please make your bank card in safe keeping. And if you lose it, please let us know.
应用解析：
be informed of 听说；接到通知；
be rightly informed 得到正确的知识；
keep...informed 随时向……报告情况；
inform against sb. 告发某人，检举某人