题号:4 题型:单选题（请在以下几个选项中选择唯一正确答案） 本题分数:3
内容:
— Good morning,sir.May I help you?— _______.
选项:
a、No,I don’t buy anything
b、No,I don’t need your help
c、Yes,I need some salt
d、Oh,no.That’s Ok