阅读下面材料,在空白处填入一个适当的词，或括号内单词的正确形式（不多于3个单词）。
By “luxury(奢侈品)”, we mean "a pleasant and often expensive thing that is not necessary". From a historical point of view, things which were a luxury when they first came into being all became necessities later.
Anything, no matter         luxurious it is, will become a necessity, when it is widely used. This is true of many of the present luxuries, among which mobile phones, cars, computers and many other things     (include). It is known to all that the purpose of the development of science is      (make) things easy for the mankind, not for only     small number of people.    , the first thing to do after a new invention occurs is to spread it so as to benefit       many people as possible. In the course of the spread, the luxury becomes decreasingly luxurious until       the end it becomes a necessity. This is an objective law, and          can be an exception.
With the quick    (develop) of science and technology, the process for many things to become a necessity from a luxury will be greatly shortened. Anything that can be imagined will be invented and in no time becomes a necessity      (access) to ordinary people.