3．
Read the following passage and fill in the blanks with proper words （在下列短文内填入恰当的词，使其内容通顺，每空格限填一词）：
In the U．S．A．people prefer waiting for a table to sitting with people they don't know．If you are sitting at a table with people you don't know，it is not polite to smoke w（67）ithout first asking if it will disturb（打扰） them．
At American restaurants and coffee shops you are usually served cold water before your order．You may find the bread and butter of no charge，and if you order coffee，you may also get a f（68）ree one．
Most cities and towns have no rules about opening and closing time for stores or restaurants，t（69）hough they usually do make rules for bars．Especially in large cities，stores may be open 24hours a day．
Servings in restaurants are often large，very large for many people．If you can't finish your meal but would like to enjoy the food l（70）ater，ask a waitress or waiter for a"doggie bag．"It may have a picture of a dog on it，but everybody knows you are taking the food away．
T（71）ips are not usually added to the bill．They are not included（包括） in the price of the meal．You should leave it on the table when you d（72）ecide to go．In some restaurants，a waitress brings a bill on a plate and you put your money there．Then they give your changes．
