MTR trains/ 100 years ago/No
Were there any MTR trains 100 years ago? No, there weren't.
washing machines /100 years ago/No
Were there any washing machines 100 years ago? No, there weren't.
a train station/ 50 years ago/Yes
Wass there a train station 50 years ago? Yes. there was.
smartphones /50 years ago/ NO
Were there any smartphones 50 years ago? No, there weren't
umbrellas/ 100 years ago / yes
Were there any umbrellas 100 years ago? Yes, there were.
a zoo / 50 years ago/ yes
Was there a zoo 50 years ago? Yes, there was.
a theme park/ 80 years ago/No
Was there a theme park 80 years ago? No, there wasn't.
frigerators / 50 years ago/ Yes
Were there any fridges 50 years ago? Yes, there were.
computers/ 100 years ago/ no
Were there any computers 100 years ago? No, there weren't.
an airport/ 15 years ago/ Yes
Was there an airport 15 years ago? Yes, there was.