去美国要有的常識

as the previous person said, you need to be 21 years old to buy cigratee and wine

also when you go to have dinner, you need to pay tips (10-20%) depends on the states and restaurant which you go.

when you go shopping, there are sales tax (different states have different rate of sales tax)

when you need to take bus or rail, please check the schedule. when you want to take taxi, mostly you must to call the taxi rather than you go on street and just take the taxi.

thanks

depend on state whereever you go. there are many different laws between states.

for example like new york, you must be 21 years old to be drink.