通读全文，根据短文理解，选择最佳答案填空。
A woman was lucky. One day, she had a chance to visit 1 the hell(地狱) and the heaven(天堂).
An angel(天使) took her to the hell first. The woman 2 a table in the hell. There was lots of food on the table. Many people sat around the table, but they felt 3. They were hungry." Why are they still hungry with so much food here?" she asked the angel.
"Look at their 4," the angel said. The people held 5 chopsticks(筷子) in their hands. They used the chopsticks to 6 the food. But the chopsticks were so long that they couldn't 7 the food to their mouths.
Then the angel took her to the heaven. There was a table and there was food on it, too. They 8 used long chopsticks. People there felt happy. They weren't hungry 9 they learned to feed each other.
That's the 10 between the hell and the heaven. Can you understand it?
