Though abroad for years many Chinese still the traditional customs.A. living…performB.

问题补充：

Though abroad for years, many Chinese still the traditional customs.

A. living…perform

B. having lived…preserve

C. having lived…observe

D. living…support

答案：

A. living…perform

B. having lived…preserve

(答案→)C. having lived…observe

D. living…support

解析： 句意:尽管许多中国人在国外住了许多年之后，他们仍然遵守传统的风俗习惯。从句的动作发生谓语动词之前，故用having lived，observe有遵守之意。故选C。