Long noodles are a(n) of long life in China so people usually eat them on their birthdays

问题补充：

Long noodles are a(n) of long life in China, so people usually eat them on their birthdays.

A. ending

B. beginning

C. symbol

D. wealth

答案：

A. ending

B. beginning

(答案→)C. symbol

D. wealth

解析：句意：在中国长寿面是长寿的一种象征，所以人们经常在过生日时吃长寿面。symbol，象征，故选C