The person making the haircut appointment for her boss?She"s not a person There"s a 1 rapidly developing in AI-have it do the things we don"t want to do.Self-driving cars get a lot of attention in this 2.But Google recently demonstrated AI for more 3 tasks.Their system is called Google Duplex--it"s a voice assistant 4 to mimic the ways humans speak to one another.Amazon,Apple and other tech companies also make voice assistants,of course.What"s 5 with Duplex is that it can carry on a conversation 6 as a human being-that is,somewhat awkwardly.And that"s the 7 of course--Google doesnt want Duplex to sound like a machine.In the hair salon 8,the woman who answers the phone throws duplex a curveball There is a point in the exchange 9 Duplex shows its true colors,10.Listen carefully and you"ll hear a11 difference between the Al"s pronunciation of“10A.M.”and“12P.M.”For just an instant,Duplex"s mismatched tones 12 you of being on hold with your bank A second Duplex clip is a bit more 13,because the person 14 the phone doesn"t seem to be 15 paying attention.Duplex tells the woman three times that he wants to 16 on Wednesday Duplex has a long way to go 17 it"ll be ready to handle open-ended conversations on 18 topics.But one day you may be 19 from all kinds of unpleasant vocal interactions.20more time for unpleasant social media interactions
4选？

A. aimed

B. designed h

C. determined

D. meant