Though having lived abroad for years many Chinese stillthe traditional customs.A. partici

问题补充：

Though having lived abroad for years, many Chinese stillthe traditional customs.

A. participate

B. attract

C. observe

D. risk

答案：

A. participate

B. attract

(答案→)C. observe

D. risk

解析：A. participate参加，B. attract 吸引，C. observe 观察，遵守，D. risk冒险，句意：虽然在国外生活了很多年，很多中国人仍然遵守的是传统的风俗。根据句意选C。