Robots differ from automatic machines ________ after completion of one specific task，they can be reprogrammed by a computer to do another one.
B
inthat意思是：在于，因为。解释differfromautomaticmachines的具体方面。
Duringthepasttwodecades,researchhas________ourknowledgeofdaydreaming.
Thefarmingmethodshavebeen________improvedwiththeinventionofthenewmachine.