Complete the sentences with words from the boxes.inbyduebecausewill1_________2040, I think humans will have walked on Mars.2.This phenomenon is __________to a wide range of factors.3.The chart predicts that by the year 2060,the country's public transportation network_________ be modernized.4 _________as little as 20 years, coffee could become a luxury.5.This is probably __________of increasing levels of literacy around the world.