1) its hard to explain .............................. some people worry about robots a) why b) what 2) many people are interested in knowing ................................ robots are made a) that b) how 3) some experts say ........................ humanlike robots will soon exist a) when b) that 4) we dont know .......................... machines will be a danger to society a) whether b) who 5) the year 1920 is ....................... the world robot was first used a) when b) that 6) ................ some artificial intelligence can do is really amazing a) what b) the

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