ADMICRO

History is full of inventions that looked good at the time, but which nobody wanted to buy. New ideas may fail for one of several reasons. Firstly, there are those which do not (i) _____ work very well when put to the lest. Then, there are the ideas which are good in themselves, but which do not fulfill a real (ii) _____. In other words people can do without them, so do not buy them. A third group are those which prove to be too expensive to manufacture. But none of these reasons explains why, in the 1990s, no new technology was (iii) _____ in replacing (iv) _____ for the home. During this time, a number of alternative technologies were invented that could have replaced the CD, but none of them (v) _____ on. The new ideas worked, were not costly to make and would have provided consumers with higher quality recordings. Despite all this, few people bought them. And this can only be explained by the fact that people who had invested in CD players and discs of their favorite music did not think the improvement in quality on offer was great enough to make it worth the effort and expense ofchanging.

(iii)_______

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