根据对话内容，从对话下边方框内的选项中选出能填入空白处的最佳选项，并将代表该选项的字母填入横线上。选项中有两项为多余选项。
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 some with 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: Oh, I see. (20)
B: Yon are welcome.
A．We Chinese usually eat rice dumplings this day.
B．I hate eating rice dumplings.
C．Thank you for your rice dumpling.
D．I don’t think so.
E．Would you like to have one
F．Already
G．How about you

液体制剂的优点不包括（）

A.药物以分子或微粒状态分散在介质中，分散度大，吸收快，能较迅速地发挥药效

B.给药途径多，可以内服，也可以外用

C.非均匀性液体制剂，药物的分散度大，分散粒子具有很大的比表面积

D.易于分剂量，服用方便，适用于婴幼儿和老年患者

E.某些固体药物制成液体制剂后，有利于提高药物的生物利用度