Fill in the blank with suitable words

Read the text below and think of the word which best fits each space. Use only ONE word in each space. 

People have always dreamed of living forever, and although we all know this will (1) ........................ happen, we still want to live as long as possible. Naturally, there are advantages and disadvantages to a long (2) ........................

In the first place, people (3) ........................ live longer can spend more time with their family and friends. Secondly, people who have busy working lives look forward to a long, relaxing time when they can do the things they have never had time for.

(4) ........................ the other hand, there are some serious disadvantages. Firstly, many people become ill and consequently have to (5) ........................ time in hospital or become (6) ........................ on their children and friends. Many of them (7) ........................ this dependence annoying or embarrassing. In addition to this, the (8) ........................ people get, the fewer friends they seem to have because old friends die or become ill and it's often (9) ........................ to make new friends.

To sum up, it seems that living to a very old age is worthwhile for people who stay healthy (10) ........................ to remain independent and enjoy life.