1) In 20 years, homes __________ clean themselves. a) will be able to b) won't be able to 2) In the future, robots __________ understand emotions. a) will be able to b) might be able to 3) Most people __________ afford space travel by 2040. a) won’t be able to b) won't be able 4) We __________ stop climate change without serious action. a) won’t be able to b) will be able to

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