问题补充：
Though having lived abroad for years，many Chinese stillthe traditional customs.
A. perform
B. possess
C. observe
D. support
答案：
A. perform
B. possess
(答案→)C. observe
D. support
解析：考察动词词义辨析。A表现；B拥有，占有；C观察；庆祝，D支持；句意：尽管生活在国外很多年，很多中国人仍然庆祝中国的传统节日。根据句意说明C正确。
