Sentence 1: Ruth had bought a bag of potatoes. 
 Sentence 3: She wasn't able to use the potatoes 
 Sentence 4:  Ruth was cooking and was going to use the potatoes 
 Sentence 5:  They had gone bad and were growing sprouts 
 Option 1: She hadn't cooked in a week or so. 
 Option 2: She cooked everyday.