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In the past, people__________(had to/didn't have to) spend a lot of time doing housework.
had to
Nowadays, people ______(have to/has to) spend a lot of less time on housework.
have to
In the past, people__________(had to/has to) wash clothes by hand.
had to
Nowadays, people ______(didn't have to/don't have to) wash clothes by hand.
don't have to
Nowadays, an office worker________(has to/ had to) learn to use computer.
has to
Two hundred years ago, most children___________ (didn't have to/ don't have to) go to school.
didn't have to
