质量成本，就是指因（）而导致的成本开支。

A.因质量不合格

B.提高质量

C.确保质量

D.研究质量

A:What’S the date today
B:It’S June 16.
A:(16)Then it’S Dragon Boat Festival today, isn’t it
B:Yes. (17)
A:Did you have rice dumplings this morning
B:Sure. (18)
A:I didn’t.
B:What a pity! But I happen to have got somewith me. (19)
A:I’d love to. By the way, why do you call it Dragon Boat Festival
B:Because in China, people race dragon boats this day every year。
A:0h, I see. (20)
B:You are welcome.
A．We Chinese usually eat rice dumplings the day.
B．I hate eating rice dumplings.
C．Thank you for your rice dumpling.
D．I don’think so.
E．Would you like to have one
F．Already
G．How about you