Direction: In the following passage, some of the words have been left out. First read the passage over and try to understand what it is about. Then fill in the blanks with the help of the alternatives given.

Scientists have developed an electronic circuit that 161 the wiring of the human brain in some ways – an achievement that 162 revolutio nalise computer science and 163 the understanding of how nature’s most powerful 164 works. The 165 built on a 166 chip the size of a finger nail, is 167 from the thinking machines of science-fiction : For one thing it cannot 168, the way the 169 can. But researchers say it could 170 in better speech and object recognition by computers.