单选题 It is important for families to observe their traditions even as their children get older.
A. notice B. watch C. celebrate D. follow

【正确答案】 D
【答案解析】[解析] 本题的四个选项都是动词。D项的意思是“遵循”，与“observe遵守”意思相吻合。A项“注意到”；B项“注视，监视”和C项“庆祝，赞美”都与题干中的词义不符。