048.
People in Poland tend to spend Christmas with their families, and the most important point of Christmas is Christmas Eve supper. The whole family just sits around the table and there are twelve traditional dishes on the table and you're supposed to taste them all because if you don't try any of them, you may have bad luck in the following year. Well, before everybody sits down to eat the supper, we just break wafers for each other, wishing each other good luck. W hen the supper is over, the children go to the other room where the big Christmas tree stands and they find some Christmas presents under the Christmas tree. And after supper the whole family just sits around the table singing Christmas songs and waiting for midnight when they go to church.

答案解析：
(1) 正确答案为B。根据People in Poland tend to spend Christmas with their families 波兰人和家人一起过圣诞节。可知，波兰人是和家人一起过圣诞节，因此B项正确。
(2) 正确答案为C。根据because if you don't try any of them, you may have bad luck in the following year. 如果你不把每道菜都尝过的话，那来年就会走霉运。因此可知，必须每道菜都尝的原因是不这么做来年就会走霉运，所以C项正确。
(3) 正确答案为C。根据 the children go to the other room where the big Christmas tree stands and they find some Christmas presents under the Christmas tree. 孩子们会去放着圣诞树的房间，在圣诞树下找到一些礼物，因此可知，孩子们是在放置圣诞树的房间找到的礼物，因此C项正确。