Read the following passage and mark the latter A, B, C or D on your answer sheet to indicate the word or phrase that best fits each of the numbered blanks

There are several key technologies which will, without doubt, (26)_______ the nature of work in the twenty first century, one of which is virtual reality. Appealing to several of your senses at once, this marvel of science presents images that respond instantaneously (27)_______ your movements. It allows people to behave as if they were somewhere completely different; this could be a place which existed hundreds of years ago, or a completely fictional one. At present, you need to wear bizarre-looking goggles to receive the images. (28)_______, as computers become smarter these will be replaced by more lightweight ones, which will be able to superimpose synthesized images onto the real world.

As software evolves, complex systems may be simplified into models which are (29)_______ longer beyond human comprehension. New ranks of specialists will clearly be needed to enable both expert (30)_______ amateur alike to access such applications. Clearly, the job opportunities this created for those trained in virtual reality will be immense.