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about 25 km/ my grandparents' house
It is about 25 km to my grandparents’ house.
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The streets used to be cleaner and more peaceful. (?)
Did the streets use to be cleaner and more peaceful?
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They used to go on holiday together. (-)
They didn’t use to go on holiday together?
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over 100 km/ my hometown/ Ho Chi Minh City
It is over 100 km from my hometown to Ho Chi Minh City.
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You used to go to school on foot. (?)
Did you use to go to school on foot?
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I didn't use to go out on Sundays. (+)
I used to go out on Sundays.
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Mr Van used to ride his motorbike dangerously. (-)
Mr Van didn’t use to ride his motorbike dangerously.
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I /used to/ small bike/ the yard/ outside/ flat
I used to ride a small bike in the yard outside my flat.
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There/ used to/ bus station/ city centre/ but/ it/ move/ the suburbs
There used to be a bus station in the city center but it was/ has been moved to the suburbs.
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Children/ must/ learn/ road safety/ before/ allowed/ ride/ bike/ road
Children must learn about road safely before they are allowed to ride on the road.
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