Question

【题目】Peter and his wife are celebrating their (five)wedding anniversary (结婚纪念日).

Answer 1

【答案】fifth
【解析】句意：彼得和他的妻子正在庆祝他们的第五个结婚纪念日。第五个用序数词fifth。注意把five中的ve变为f再加th。所以答案是：fifth。