5. As a valued ________ of this well-established society, Mrs. Guillermo is still active and takes part in most of the events even at a ripe age of 88.
(A) channel
(B) army
(C) ideal
(D) member

Doing so shows the employee that they're a priority and a valued member of the organization.

做這些能表名員工是他們重要的一員，也是這個公司的重要組成部分。

Irrespective of the position you hold, you are a valued member of our team.

無論您擔任什么職位，您將是我們團隊之中的一位重要成員。
 -

well established
having a recognized position, or being generally known about
得到確認的；公認的

The rules, though not written down, are fairly well established.
那些規則雖然沒有寫下來，卻是得到公認的。
World Music is now well established and popular with mass audiences.
世界音樂現在已廣為人知，並受到廣大聽眾的喜愛。

-
 a ripe old age
the condition of being very old; used especially to talk about someone who has a long healthy life
高齡；高壽

I'm sure he'll live to a ripe old age.
我肯定他會高夀的。
My grandmother died at the ripe old age of 92.
我祖母在92歲高齡時去世。

-