Many Chinese have lived abroad for years but they still the traditional customs.A. obser

问题补充：

Many Chinese have lived abroad for years, but they still the traditional customs.

A. observe

B. behave

C. perform

D. struggle

答案：

(答案→)A. observe

B. behave

C. perform

D. struggle

解析：本题考查动词辨析。句意：许多中国人尽管在国外居住了许多年，但仍奉行传统的习俗。perform执行，表演；behave行为；observe遵守，奉行(习俗等)；struggle奋斗，斗争。由句意可知C项正确。