题干
---Did your car break down again this morning?
---Yes．That’s ____ I was late．
---Yes．That’s ____ I was late．
A：why
B：because
C：how
D：for
答案(点此获取答案解析）
A
予“黑人店”。缺斤少两，欺诈顾客违反了市场交易的（ ）原则