"Thank you" means that you recognize that someone has done something for you. Thus we thank people all day ( 1) even for the smallest, most ( 2) things. If a waitress brings you a ( 3) of coffee, you say "Thank you". When you ( 4) your food and get your ( 5), you say "Thank you" to the ( 6). If someone gives you ( 7) in the street, you say "Thank you". If someone ( 8) you to dinner, you say "Yes, thank you, I'd ( 9) to come." However, that's more than (10). Excessive expressions of gratitude (11) Westerners extremely (12) and gives a sense of (13) thanks, a sense of formal or required Kowtowing (叩头) which does not (14) gratitude but insincerity. For example, if your advisor spends a half-hour of his time (15) you edit some letter you've just written, you will (16) to say "Thank you, I really (17) your time." But one or two phrases of that (18) is enough. If you go on and on (19) statements about his kindness, the person will feel not thanked but (20) and will not be anxious to help you again.
1.long round over about
2.ordinary tiny usual often
3.bottle tin can cup
4.pay back pay off pay up pay for
5.coins change bills charge
6.customer cashier principal postman
7.suggestion direction hints interview
8.orders brings demands invites
9.want love need move
10.efficient enough full certain
11.take do make cause
12.unhappy unlucky unlikely uncomfortable
13.empty full grateful troubled
14.indicate tell signify direct
15.helping to help on helping helped
16.want use need bother
17.waste appreciate spend cost
18.sort type variety style
19.to through with by
20.dissatisfied annoyed hated disturbed
答案：
AADDB BBDBB CDACA CBACB
