Complete the following paragraph with key information from the text. （填写对应序号）It is easy to 1things _____ if you move to live in a new country with a different culture from your own. You may find yourself facing a whole new set of 2about the proper way to behave. Go out to 3with your new friends and you may find yourself having to 4a whole new set of table manners. Then there is the problem of who is responsible for paying for the meal. This may not be immediately 5. In some countries friends share the cost equally at the end of the meal, in others the 6is for friends to take turns, 7one meal with another at a later date. 8the details of local customs like these may take time, but, 9_______ , it is well worth the effort if you want to avoid misunderstandings.