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4)
Laura didn't use to drive a car when she was a child.
John used to read comics when he was a child.
Liz and Dan didn't use to study all day when they were children.
Mark used to listen to pop music when he was a child.
Jane used to ride a bicycle when she was a child.

5) 
when
as soon as
after
until
as soon as

6)
David and Sarah went to the beach in the afternoon.
They ran to the woman who was crying and calling out.
The dog was in the water and couldn't swim back to the shore. 
It was written that the dog was a hero who saved two kids.