单项选择题


Fill in each of the following blanks with ONE Word to complete the meaning of the passage.
Predictions of large populations of robots in industry have yet to come true. For a decade or more, manufacturers of big robots have explained how their machines can make industry more competitive and productive. The market for 51 robots is now oversupplied, and the driving force of the robotics (机器人技术) revolution is 52 to be with makers of machines that handle a few kilos at most.
"Heavy-robot manufacturers are in some difficulty 53 finding customers. They are offering big 54 just to get in the door. There has been a 55 growth everywhere in the numbers of robots, so we have to admit we are either deceiving 56 or that the market is slowly growing, "said John Reekie, Chairman of Colne Robotics. "The following things must happen 57 the robotics revolution to occur. We must achieve widespread robot literacy (文化), 58 there has been a computer literacy program, there must be a robot literacy campaign. We must also 59 not just a cut in, but a collapse of robot prices 60 ,some kind of artificial intelligence needs to be available".

A.However
B.Finally
C.Whereas
D.Therefore