Sentence 1: During World War II the highway near my grandma's farm was empty. 
 Sentence 3: They roller skated up and down the empty highway 
 Sentence 4:  Then they would eat sandwiches for lunch under a big oak tree 
 Sentence 5:  After lunch they would rollerskate some more 
 Option 1: My grandma and her sister would run in the roads for exercise. 
 Option 2: My grandma and her sister would get their roller skates out every day.