A) encourage B) grown C) intelligence D) altering E) moving F) complex G) existence H) control I) discourage J ) fight K) frontiers L) render M) building N) rival O) further The human brain contains 10 billion cells and each of these may have a thousand connections. Such enormous numbers used to (36)___________ us and cause us to dismiss the possibility of making a machine with human-like ability, but now that we have (37)_________ used to moving forward at such a pace we can be less sure. Quite soon, in only 10 or 20 years perhaps, we will be able to assemble a machine as (38) ________ as the human brain, and if we can we will. It may then take us a long time to (39) _________ it intelligent by loading in the right software or by (40) ____________ the architecture, but that too will happen. I think it is certain that in decades, not centuries, machines of silicon( 硅 ) will arise first to (41)___________ and then exceed their human ancestors. Once they exceed us they will be capable of their own design. In a real sense they will be able to reproduce themselves. Silicon will have ended carbon’s long (42) ________. And we will no longer be able to claim ourselves to be the finest (43) _________ in the known universe. As the intelligence of robots increases to match that of humans and as their cost declines through economies of scale, we may use them to expand our (44) __________, first on earth through their ability to withstand environments, harmful to ourselves. Thus, deserts may bloom and the ocean ends be mined. (45) __________ahead, by a combination of the great wealth this new age will bring and the technology it will provide, the construction of a vast, man-created world in space, home to thousands or millions of people, will be within our power.