Match the functions to the inventions mentioned in the text. refrigerator the Internet penicillin mapping of human DNA jet airplane air conditioner 1 It can keep things fresh for longer. ( ) 2 It made it easier to visit other places. ( ) 3 It made it easier to live in some harsh places. ( ) 4 It changed the way we shop and communicate. ( ) 5 It protected people’s health. ( ) 6 It may save human lives in the future. ( )